DS3/STS-1 Protected Repeater System User Manual

Transcription

1 13959-A ADCP Issue 3 August 2000 DS3/STS-1 Protected Repeater System User Manual 8289-A 8288-A 23-Inch, 16-Slot Chassis 19-Inch, 12-Slot Chassis (shown with 23-inch extension brackets) 8287-A Portable 9-Slot Chassis Wall Mount Chassis A 23-Inch Horizontal Chassis Rev A

2 ADCP Issue 3 August 2000 Preface COPYRIGHT All Rights Reserved Printed in the U.S.A. REVISION HISTORY ISSUE DATE REASON FOR CHANGE 1st Edition, Issue 1 12/1996 1st Edition, Issue 2 05/1998 Issue 3 08/2000 Update to current format standards. TRADEMARK FORMATION ADC and ADC Telecommunications are registered trademarks of ADC Telecommunications, Inc. DISCLAIMER OF LIABILITY Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period. This publication may be verified at any time by contacting ADC s Technical Assistance Center at , extension 3475 (in U.S.A. or Canada) or (outside U.S.A. and Canada), or by writing to ADC Telecommunications, Inc., Attn: Technical Assistance Center, Mail Station #71, P.O. Box 1101, Minneapolis, MN , U.S.A. ADC Telecommunications, Inc. P.O. Box 1101, Minneapolis, Minnesota In U.S.A. and Canada: Outside U.S.A. and Canada: (952) Fax: (952) Page ii

3 ADCP Issue 3 August 2000 Preface TABLE OF CONTENTS Content Page PREFACE AB THIS MANUAL...vii ADMONISHMENTS...vii SECTION 1 TRODUCTION 1 TELECOMMUNICATIONS USE SIGNAL RATES SECTION 2 REPEATER SYSTEM GENERAL FORMATION 1 RACK MOUNTG CHASSIS PROTECTED REPEATER MODULES NON-PROTECTED REPEATER MODULES SECTION 3 DESCRIPTION 1 GENERAL CHASSIS Rack Mounting Chassis Wall Mounting Chassis System Powering Remote Alarming PORTABLE CHASSIS IOR MODULE General Application Signal Connections Power Connections Front Panel LEDs Mode Selection Line Build-Out PIOR MODULES General Application Signal Connections Switching Capabilities Power Connections Front Panel LEDs Mode Selection Line Build-Out (continued) Page iii

4 ADCP Issue 3 August 2000 Preface TABLE OF CONTENTS Content Page SECTION 3 DESCRIPTION (continued) 6 BOR MODULE General Application Signal Connections Power Connections Front Panel LEDs Mode Selection Line Build-Out (RP3-B20000 Repeater Module Only) PBOR MODULES General Application Signal Connections Switching Capabilities Power Connections Front Panel LEDs Mode Selection SPECIFICATION SHEET SECTION 4 RACK MOUNT STALLATION STRUCTIONS 1 GENERAL Mounting Chassis in Rack Connecting Frame Ground, Power, and Alarm Wires Installing Repeater Modules in the Mounting Chassis SECTION 5 WALL MOUNT STALLATION STRUCTIONS 1 GENERAL Mounting Chassis on Interior Wall Connecting Frame Ground, Power, and Alarm Wires SECTION 6 PORTABLE CHASSIS STALLATION STRUCTIONS 1 GENERAL Installing BOR Modules in the Portable Chassis Powering the Portable Chassis (continued) Page iv

5 ADCP Issue 3 August 2000 Preface TABLE OF CONTENTS Content Page SECTION 7 OPERATION 1 GENERAL ALARM REPORTG Minor Alarm Reporting Major Alarm Reporting PATCH AND ROLL PROCEDURES SECTION 8 MATENANCE 1 GENERAL PREVENTIVE MATENANCE SECTION 9 GENERAL FORMATION 1 WARRANTY/SOFTWARE SOFTWARE SERVICE AGREEMENT REPAIR/EXCHANGE POLICY REPAIR CHARGES REPLACEMENT/SPARE PRODUCTS RETURNED MATERIAL CUSTOMER FORMATION AND ASSISTANCE Page v

6 ADCP Issue 3 August 2000 Preface Page vi

7 ADCP Issue 3 August 2000 Preface AB THIS MANUAL This manual provides a general description of the DS3/STS-1 Protected Repeater System. The manual also provides all instructions necessary to install, operate, and maintain the system. ADMONISHMENTS Important safety admonishments are used throughout this manual to warn of possible hazards to persons or equipment. An admonishment identifies a possible hazard and then explains what may happen if the hazard is not avoided. The admonishments in the form of Dangers, Warnings, and Cautions must be followed at all times. These warnings are flagged by use of the triangular alert icon (seen below), and are listed in descending order of severity of injury or damage and likelihood of occurrence. Danger: Danger is used to indicate the presence of a hazard that will cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Warning: Warning is used to indicate the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Caution: Caution is used to indicate the presence of a hazard that will or can cause minor personal injury or property damage if the hazard is not avoided. Page vii

8 TRODUCTION

9 ADCP Issue 3 August 2000 Section 1: Introduction SECTION 1: TRODUCTION Content Page 1 TELECOMMUNICATIONS USE SIGNAL RATES TELECOMMUNICATIONS USE The DS3/STS-1 Protected Repeater System provides a cost effective means of rerouting or distributing DS3 or STS-1 signals. The system consists of a series of mounting chassis and plug-in module options allowing the user to install a repeater system in accordance with site requirements. Each repeater module has a switch-selectable data rate capacity that allows the repeater to operate in either the DS3 rate or the STS-1 rate. Power supplies within the individual repeater modules eliminate the need for chassis mounted power supplies. 2 SIGNAL RATES This repeater system operates at either the North American Digital Signal (DS) Hierarchy DS3 bit rate of Mbps or the SONET Synchronous Transport Signal (STS) Hierarchy STS-1 bit rate of Mbps. The data rate is switch selectable. Page 1-1

10 REPEATER SYSTEM GENERAL FORMATION

11 ADCP Issue 3 August 2000 Section 2: Repeater System General Information SECTION 2: REPEATER SYSTEM GENERAL FORMATION Content Page 1 RACK MOUNTG CHASSIS PROTECTED REPEATER MODULES NON-PROTECTED REPEATER MODULES RACK MOUNTG CHASSIS The repeater modules can be used in any of the following mounting chassis: 16-position mounting chassis, 6.0" H 23.0" W 11.7" D, Catalog No. RP3-2A position mounting chassis, 6.0" H 19.0/23.0" W 11.7" D, Catalog No. RP3-1A0000 Portable 9-position mounting chassis, 7.8" H 13.5" W 13.0" D, Catalog No. RP3-3A position wall-mounting chassis, 7.5" H 1.9" W 8.7" D, Catalog No. RP-3 4A position mounting chassis, 1.7" H 23.0" W 11.6" D, Catalog No. RP3-5A PROTECTED REPEATER MODULES The system can be configured in a fully-protected hot-standby mode by populating the mounting chassis with the following protected modules: DS3/STS-1 Protected Dual Intraoffice Repeater (PIOR), (Catalog No. RP3-F10000) DS3/STS-1 Protected Bridging Office Repeater (PBOR), (Catalog No. RP3-G10000) The PIOR modules are always configured in pairs to protect the continuous service of DS3 or STS-1 circuits. In the event of a module failure, the redundant (protect) module is immediately activated to take over the functions of the circuits on the failed (working) module. Each PIOR module is configured with two regenerator circuits feeding separate data paths. Each PBOR module is configured with two regenerator circuits that share a single data path. In the event of a failure, the redundant regenerator circuit is immediately activated to take over the functions of the failed regenerator circuit. The data paths on the PIOR module can be configured for bi-directional or unidirectional communication. Page 2-1

12 ADCP Issue 3 August 2000 Section 2: Repeater System General Information 3 NON-PROTECTED REPEATER MODULES This repeater system can also be operated in the non-protected mode by installing the following modules: DS3/STS-1 Dual Intraoffice Repeater (IOR), (Catalog No. RP3-A10000) DS3/STS-1 Dual Intraoffice Repeater (IOR) with Alarm Shutoff, (Catalog No. RP3-A20000) DS3/STS-1 Dual Bridging Office Repeater (BOR), (Catalog No. RP3-B10000) DS3/STS-1 Dual Bridging Office Repeater (BOR) with External Long/Short Cable Selection, (Catalog No. RP3-B20000) Each IOR and BOR module is configured with two regenerator circuits with separate data paths that can be configured for bi-directional or unidirectional communication. Page 2-2

13 DESCRIPTION

14 ADCP Issue 3 August 2000 Section 3: Description SECTION 3: DESCRIPTION Content Page 1 GENERAL CHASSIS Rack Mounting Chassis Wall Mounting Chassis System Powering Remote Alarming PORTABLE CHASSIS IOR MODULE General Application Signal Connections Power Connections Front Panel LEDs Mode Selection Line Build-Out PIOR MODULES General Application Signal Connections Switching Capabilities Power Connections Front Panel LEDs Mode Selection Line Build-Out BOR MODULE General Application Signal Connections Power Connections Front Panel LEDs Mode Selection Line Build-Out (RP3-B20000 Repeater Module Only) PBOR MODULES General Application Signal Connections Switching Capabilities Power Connections Front Panel LEDs Mode Selection SPECIFICATION SHEET Page 3-1

15 ADCP Issue 3 August 2000 Section 3: Description 1 GENERAL 2 CHASSIS This section provides functional, physical, and technical descriptions of the DS3/STS-1 Protected Repeater System plus basic application information. The DS3/STS-1 Protected Repeater System provides a cost-effective means of distributing and rerouting DS3 or STS-1 signals. Designed to operate from a 48 Vdc office supply, this system can be configured as either a fully-protected hot standby system or with a mixture of protected PIOR or PBOR modules and non-protected IOR or BOR modules. The only restriction is that the PIOR modules must be installed in pairs in adjacent odd-even slots. (See Figure 4-3.) Repeater chassis are designed to be installed in a standard equipment rack or cabinet located in a Central Office or other restricted access area. The repeater chassis can be installed in a 19-inch or 23-inch rack, or on an interior wall. All the repeaters in this system are the same size 1.3" wide, 6.0" high, and approximately 9.0" long (3.2 cm 15.0 cm 22.8 cm). 2.1 Rack Mounting Chassis The 19-inch chassis shown in Figure 3-1 can be configured with up to 12 modules. Protected and non-protected modules may be intermixed in the same chassis. The standard 23-inch chassis shown in Figure 3-2 can be configured with up to 16 modules. The horizontal 23-inch chassis shown in Figure 3-3 can be configured with up to three modules. Protected and non-protected modules may be intermixed in the same chassis (15.2 CM) (48.3 CM) (29.7 CM) 9004-B Figure Inch Rack Mount Chassis Page 3-2

16 ADCP Issue 3 August 2000 Section 3: Description 6.0. (15.2 CM) (58.4 CM) (29.7 CM) 9003-B Figure Inch Rack Mount Chassis 1.1. (2.7 CM) 1.7. (4.4 CM) (58.4 CM) (29.5 CM) B Figure Inch Horizontal Rack Mount Chassis 2.2 Wall Mounting Chassis The wall mount chassis shown in Figure 3-4 holds a single protected or non-protected repeater module of any type. Page 3-3

17 ADCP Issue 3 August 2000 Section 3: Description 1.9. (4.8 CM) 7.5. (19.1 CM) 8.7. (22.2 CM) B Figure 3-4. Wall Mount Chassis 2.3 System Powering To provide redundant power and full alarm capability, all DS3/STS-1 chassis are powered from two separate 48 Vdc office battery power sources. The power inputs to the chassis should be fused externally at a convenient, nearby fuse and alarm panel. Power is applied to the chassis through a screw-down terminal block at the left end of the chassis backplane. See Figures 4-3 and 4-4. Module interfaces to 48 Vdc office battery power sources are via the 96-pin connectors located within the chassis and the 96-pin mating connector on each repeater module. An onboard DC-to-DC converter within each repeater module produces the voltage required to power the regeneration circuits. An internal non-user-replaceable fuse within each repeater module provides overcurrent protection should an internal failure cause the repeater to draw excessive current. A green POWER LED on the front panel of each repeater indicates whenever the repeater module is powered. Page 3-4

18 ADCP Issue 3 August 2000 Section 3: Description 2.4 Remote Alarming The PIOR and PBOR repeaters report major and minor alarms through alarm relays and front panel LED indicators. The front panel LED indicators for IOR, PIOR, BOR, and PBOR modules are shown in Tables 3-2, 3-6, 3-10, and 3-15, respectively. Separate sets of alarm LEDs are provided for each regenerator channel (A and B) in the IOR, PIOR, and BOR, and for circuits 1 and 2 in the PBOR. Each alarm relay consists of a set of contacts with normally open (NO) and common (COM) contacts. Alarm signals from individual modules are routed through the 96-pin connectors, through the chassis backplane, to the screw-down terminal block at the left end the chassis backplane. Four pins of the terminal block are wired to local alarm surveillance equipment. For more detailed information concerning alarm indications, refer to individual repeater module descriptions. On PIOR modules, all faults activate the minor alarm relay. On all other modules except the PIOR, loss of a received signal activates the minor alarm and causes the front panel RX LOS LED to light yellow. On all modules except the PIOR, the major alarm relay is activated by loss of both external A and B power feeds, failure of the power converter, a blown fuse, or loss of the output signal in the presence of an input signal. The TX LOS LED will also be red for loss of output only. On the PIOR module, the major alarm relay is activated by the same conditions that cause a major alarm on the other modules but these conditions must be present on both modules. 3 PORTABLE CHASSIS The 13-inch-wide portable chassis (Figure 3-5) holds a total of nine BOR or PBOR modules and is powered directly from a grounded, 110 Vac wall socket. The portable chassis has a cover to protect modules during transport. A storage area within the cover holds the power cord, patch cords and manual. The portable chassis has no remote alarming capabilities. Page 3-5

19 ADCP Issue 3 August 2000 Section 3: Description 7.8. (19.8 CM) (34.3 CM) (33.0 CM) 9002-C Figure 3-5. Portable Chassis 4 IOR MODULE 4.1 General The DS3/STS-1 Dual Intraoffice Repeater Modules (IOR) shown in Figures 3-6 and 3-7 are used in DSX-3 applications where the maximum distance allowed between DSX-3 crossconnect bays, or the distance between a DSX-3 cross-connect bay and DS3/STS-1 equipment, is exceeded. The maximum length allowed for cross-connect cables between DSX-3 bays is a function of the cable type selected and the operating mode as shown in Table 3-1. The maximum allowed input and output cable length between a DSX bay and a network element is also a function of the cable type selected and the operating mode as shown in Table 3-1. These distances should be used as general approximations for system planning. Actual distances will vary depending on the loss characteristics of the specific cable used. Page 3-6

20 ADCP Issue 3 August 2000 Section 3: Description DS3/STS POWER CHANNEL A MON TX LOS RX LOS STS1 DS3 CHANNEL B MON TX LOS RX LOS CODE CAT # DATE S/N USA MADE 8974-B RP3-A10000 Figure 3-6. DS3/STS-1 IOR Module DS3/STS POWER CHANNEL A MON TX LOS RX LOS LBO A SHORT LONG B STS1 DS3 CHANNEL B MON TX LOS RX LOS CAT # DATE S/N USA MADE CODE A M ALARM ON OFF RP3-A20000 Figure DS3/STS-1 IOR Module with Alarm Enable/Disable Page 3-7

21 ADCP Issue 3 August 2000 Section 3: Description Table 3-1. IOR Cross-Connect/Network Equipment Cable Lengths COAXIAL CABLE TYPE MAXIMUM LENGTH OF CROSS-CONNECT CABLES DS3 MODE 728 Not Used 734A Not Used 735A 20.6 ft. (6.3 m) RG ft (8.0 m) TRIAX 13.5 ft (4.1 m) STS-1 MODE Not Used Not Used 18.0 ft (5.5 m) 23.9 ft. (7.3 m) 12.5 ft. (3.8 m) MAXIMUM LENGTH OF EQUIPMENT CABLES DS3 MODE ft. (137.2 m) ft (144.2 m) ft (68.6 m) ft (102.4 m) Not Used STS-1 MODE ft. (127.4 m) ft (134.1 m) ft (65.5 m) ft (96.6 m) Not Used Each IOR module consists of a printed circuit board, front panel, and sheet metal enclosure. The catalog number of the repeater is printed on the front panel for identification purposes, and the common language equipment identifier (CLEI) label is also mounted on the front panel. The IOR module has a separate monitor (MON) jack for each channel (A and B). The IOR module is shipped with blank designation labels that can be mounted on the front panel and marked with the circuit designations. The DS3/STS-1 mode select switch and all visual indicators (LEDs) are on the repeater front panel. (The mode select switch is recessed into the front panel to prevent inadvertent activation.) Functions of all the front panel indicators, switches, and coaxial jacks are listed in Table Application The DS3/STS-1 Dual Intraoffice Repeater Module (IOR) is used to extend the range of DS3 and STS-1 signals by increasing the maximum cable distance allowed between DSX crossconnect bays, and the cable distance between DSX bays and DS3/STS-1 equipment. The maximum cable distance allowed between the IOR repeater and a DSX-3 bay, or between the IOR repeater and a network element, is defined by the cable type selection, the setting of the channel A and B line build-out (LBO) switches (see section 4.7), and the operating mode selection (see section 4.6). The first application shown in Figure 3-8 illustrates a repeater situated between two DSX-3 bays. This application allows a maximum cable separation of 900 feet (274.3 meters) between bays. The second application in Figure 3-8 illustrates a repeater situated between a DSX-3 bay and a network element, such as a multiplexer (Mux) or a digital cross-connect system (DCS). This application allows a maximum cable separation of 1,350 feet (411.5 meters) between the bay and the network element. Page 3-8

22 ADCP Issue 3 August 2000 Section 3: Description DSX-3 DS3/STS-1 DUAL TRAOFFICE REPEATER DSX-3 A X X B 900 FEET (274.3 M) MAXIMUM DS3 "SHORT" DISTANCE X: 0 FT. TO 200 FT. (0 M TO 61 M) DS2 "LONG" DISTANCE X: 200 FT. TO 450 FT. (60 M TO M) STS-1 "SHORT" DISTANCE X: 0 FT. TO 125 FT. (0 M TO 38.1 M) STS-1 "LONG" DISTANCE X: 125 FT. TO 450 FT. (38.1 M TO M) DSX-3 BAY TO DSX-3 BAY DSX-3 DS3/STS-1 DUAL TRAOFFICE REPEATER MUX OR DCS A X X 450 FEET B 1350 FEET (411.5 M) MAXIMUM DS3 "SHORT" DISTANCE X: 0 FT. TO 200 FT. (0 M TO 61 M) DS2 "LONG" DISTANCE X: 200 FT. TO 450 FT. (60 M TO M) STS-1 "SHORT" DISTANCE X: 0 FT. TO 125 FT. (0 M TO 38.1 M) STS-1 "LONG" DISTANCE X: 125 FT. TO 450 FT. (38.1 M TO M) DSX-3 BAY TO NETWORK ELEMENT 8900-D Figure 3-8. IOR Module Applications Figure 3-9 shows a cabling diagram for a typical IOR repeater module bay-to-bay application. DSX-3 DSX-3 OR CROSS-AISLE TERMAL UP TO 900 FT. (274.3 M) 734 TYPE COAX I/O DUAL REPEATER DSX-3 OR CROSS-AISLE TERMAL DSX-3 MON JACK MON JACK JACK XO XO A REGEN A A XO XO JACK NETWORK ELEMENT JACK XI XI B REGEN B B XI XI JACK NETWORK ELEMENT X-CONN MOUNTG SHELF POSITION 1-16 X-CONN C UP TO 450 FT. (137.2 M) UP TO 450 FT. (137.2 M) Figure 3-9. IOR Module Cabling Diagram The IOR module can be used as either a dual regenerator connected to one DS3 or STS-1 circuit, or as two single regenerators connected to separate circuits. Page 3-9

23 ADCP Issue 3 August 2000 Section 3: Description 4.3 Signal Connections A block diagram of the IOR module is shown in Figure All the DS3 or STS-1 signal connections to the IOR modules are made through 75-ohm BNC connectors on the chassis backplane. The signals are passed through the chassis to the modules via the 96-pin connectors located within the chassis, and the 96-pin mating connector on the rear of each module. Two front panel midsize coaxial monitor (MON) jacks permit non-intrusive testing of the Channel A and Channel B outputs. / CABLE TERFACE A MOUNTG CHASSIS BACKPLANE BNC CONNECTORS A REGEN A FRONT PANEL MIDSIZE JACKS CHANNEL A MON LBO SWITCHES CHANNEL B B MOUNTG CHASSIS BACKPLANE BNC CONNECTORS B REGEN B MON FRONT PANEL LEDS POWER AND ALARM TERFACE FRONT PANEL STS1/DS3 MODE SWITCH POWER 48 VDC RTN A 48 VDC A 48 VDC B 48 VDC RTN B POWER SUPPLY CONTROL CIRCUITS CHANNEL A TX LOS MOUNTG CHASSIS SCREWDOWN TERMAL RX LOS MAJ ALRM NO MAJ ALRM COM M ALRM NO M ALRM COM ALARM RELAYS CHANNEL B TX LOS RX LOS FRONT PANEL MOR ALARM ON/OFF SWITCH (RP3-A20000 ONLY) 8316-D Figure DS3/STS-1 IOR Module Block Diagram Page 3-10

24 ADCP Issue 3 August 2000 Section 3: Description 4.4 Power Connections The 48 Vdc office battery power is applied from the chassis backplane through the 96-pin connector located on the rear panel of the repeater module. An onboard DC-to-DC converter within each repeater module produces the voltage required to power the regeneration circuits. An internal non-user-replaceable fuse within each repeater module provides overcurrent protection should an internal failure cause the repeater to draw excessive current 4.5 Front Panel LEDs A green POWER LED on the front panel of each repeater indicates whenever the repeater module is powered. The alarm indicators on the IOR module include the front panel RX LOS (receive loss of signal) and TX LOS (transmit loss of signal) LEDs. Loss of input signal to channel A or channel B causes the associated RX LOS LED to light yellow and closes the module minor alarm relay. Loss of a channel s output signal in the presence of an input signal causes the associated TX LOS LED to light red and closes the module major alarm relay, assuming the other channel is operating. The M ALARM ON/OFF (enable/disable minor alarm) switch on the RP3-A20000 module front panel allows the user to enable or disable lighting the RX LOS LEDs and open or close the minor alarm relay. Table 3-2 lists the IOR module LED colors and their corresponding conditions. Table 3-2. IOR Front PaneL LEDs POWER CHANNEL A TX LOS RX LOS CHANNEL B TX LOS RX LOS POWER LED CH A TX LOS CH A RX LOS CH B TX LOS CH B RX LOS COLOR/CONDITION GREEN YELLOW DARK RED Normal N/A Loss of 48 Vdc Loss of +5 Vdc N/A N/A Normal Transmit Loss of Signal N/A Receive Loss Normal N/A of Signal N/A N/A Normal Transmit Loss of Signal N/A Receive Loss Normal N/A of Signal A 4.6 Mode Selection STS-1 or DS3 repeater operation is set by the STS1/DS3 mode selection switch recessed into the front panel of the repeater module. Page 3-11

25 ADCP Issue 3 August 2000 Section 3: Description 4.7 Line Build-Out The LBO switches are recessed into the top panel of the RP3-A10000 IOR repeater module, or on the front panel of the RP3-A20000 IOR repeater module. Refer to Table 3-3 to determine whether the switches should be set to SHORT or LONG and set the switches accordingly. The information in Table 3-3 is also provided on the side cover of the module. Note: The maximum cable lengths described in section 4.2 must not be exceeded. CABLE TYPE Table 3-3. IOR Maximum Allowable Repeater Cable Lengths DS3/STS-1MODE DS3 MODE STS-1 MODE PUT CABLES ft (137.2 m) 734A 450 ft (137.2 m) 735A 225 ft (68.6 m) RG ft (102.1 m) PUT CABLES (SHORT) 200 ft (61.0 m) 200 ft (61.0 m) 100 ft (30.5 m) 150 ft (45.7 m) PUT CABLES (LONG) 450 ft (137.2 m) 450 ft (137.2 m) 225 ft (68.6 m) 335 ft (102.1 m) PUT CABLES (SHORT) 125 ft (38.1 m) 125 ft (38.1 m) 60 ft (18.3 m) 90 ft (27.4 m) PUT CABLES (LONG) 450 ft (137.2 m) 450 ft (137.2 m) 225 ft (68.6 m) 335 ft (102.1 m) 5 PIOR MODULES 5.1 General The DS3/STS-1 Protected Dual Intraoffice Repeater Module (PIOR) shown in Figure 3-11 is used in DSX-3 applications where the maximum distance allowed between DSX-3 cross-connect bays, or the distance between a DSX-3 cross-connect bay and DS3/STS-1 equipment, is exceeded. The protection feature adds a redundant module to the network to protect the continuous service of DS3 or STS-1 circuits. The maximum length allowed for cross-connect cables between DSX-3 bays is a function of the cable type selected and the operating mode as shown in Table 3-4. The maximum allowed input and output cable length between a DSX bay and a network element is also a function of the cable type selected and the operating mode as shown in Table 3-4. These distances should be used as general approximations for system planning. Actual distances will vary depending on the loss characteristics of the specific cable used. Page 3-12

26 A B ADCP Issue 3 August 2000 Section 3: Description LONG COL LBO SHORT COL DS3/STS POWER CHANNEL A TX LOS MON RX LOS ON LE SELECT STS1 OPT ERR DS3 CHANNEL B TX LOS RX LOS MON CODE CAT # DATE S/N MADE USA 8976-A RP3-F10000 Figure DS3/STS-1 PIOR Module Table 3-4. PIOR Cross-Connect/Network Equipment Cable Lengths COAXIAL CABLE TYPE MAXIMUM LENGTH OF CROSS-CONNECT CABLES DS3 MODE 728 Not Used 734A Not Used 735A 20.0 ft. (6.3 m) RG ft. (8.0 m) TRIAX 13.5 ft. (4.1 m) STS-1 MODE Not Used Not Used 18.0 ft. (5.5 m) 23.9 ft. (7.3 m) 12.5 ft. (3.8 m) MAXIMUM LENGTH OF EQUIPMENT CABLES DS3 MODE ft. (137.2 m) ft (144.2 m) ft. (68.6 m) ft. (102.4 m) Not Used STS-1 MODE ft. (127.4 m) ft. (134.1 m) ft. (65.5 m) ft. (96.6 m) Not Used Page 3-13

27 ADCP Issue 3 August 2000 Section 3: Description Each PIOR module consists of a printed circuit board, front panel, and sheet metal enclosure. The catalog number of the repeater is printed on the front panel for identification purposes, and the common language equipment identifier (CLEI) label is also mounted on the front panel. The PIOR module has a separate monitor (MON) jack for each channel (A and B). The PIOR module is shipped with blank designation labels that can be mounted on the front panel and marked with the circuit designations. The DS3/STS-1 mode select switch and all visual indicators (LEDs) are on the repeater front panel. (The mode select switch is recessed into the front panel to prevent inadvertent activation.) Functions of all the front panel indicators, switches, and coaxial jacks are listed in Table Application The DS3/STS-1 Protected Dual Intraoffice Repeater Module (PIOR) is used to extend the range of DS3 and STS-1 signals by increasing the maximum cable distance allowed between DSX cross-connect bays, and the cable distance between DSX bays and DS3/STS-1 equipment. The product has the same applications as an IOR module but is deployed in pairs. The redundant PIOR module can be used as either a dual regenerator connected to one DS3 or STS-1 circuit, or as two single regenerators connected to separate circuits. The maximum cable distance allowed between the PIOR repeater and a DSX-3 bay, or between the PIOR repeater and a network element, is defined by the cable type selection, the setting of the channel A and B line build-out (LBO) switches (see section 5.8), and the operating mode selection (see section 5.7). The first application shown in Figure 3-12 illustrates a repeater situated between two DSX-3 bays. This application allows a maximum cable separation of 900 feet (274.3 meters) between bays. The second application in Figure 3-12 illustrates a repeater situated between a DSX- 3 bay and a network element, such as a multiplexer (Mux) or a digital cross-connect system (DCS). This application allows a maximum cable separation of 1,350 feet (411.5 meters) between the bay and the network element. Page 3-14

28 ADCP Issue 3 August 2000 Section 3: Description DSX-3 X A DSX-3 A B X B X X 900 FEET (274.3 M) MAXIMUM DS3 "SHORT" DISTANCE X: 0 FT. TO 200 FT. (0 M TO 61 M) DS2 "LONG" DISTANCE X: 200 FT. TO 450 FT. (60 M TO M) STS-1 "SHORT" DISTANCE X: 0 FT. TO 125 FT. (0 M TO 38.1 M) STS-1 "LONG" DISTANCE X: 125 FT. TO 450 FT. (38.1 M TO M) DSX-3 BAY TO DSX-3 BAY DSX-3 X A MUX OR DCS A B 450 FEET X B X X 1350 FEET (411.5 M) MAXIMUM DS3 "SHORT" DISTANCE X: 0 FT. TO 200 FT. (0 M TO 61 M) DS2 "LONG" DISTANCE X: 200 FT. TO 450 FT. (60 M TO M) STS-1 "SHORT" DISTANCE X: 0 FT. TO 125 FT. (0 M TO 38.1 M) STS-1 "LONG" DISTANCE X: 125 FT. TO 450 FT. (38.1 M TO M) 9137-C DSX-3 BAY TO NETWORK ELEMENT Figure PIOR Module Applications Figure 3-13 shows a cabling diagram for a typical PIOR repeater module bay-to-bay application. DSX-3 DSX-3 OR CROSS-AISLE TERMAL UP TO 900 FT. (274.3 M) 734 TYPE COAX I/O DUAL REPEATER DSX-3 OR CROSS-AISLE TERMAL DSX-3 MON JACK MON JACK JACK XO XO A REGEN A A XO XO JACK NETWORK ELEMENT JACK XI XI B REGEN B B XI XI JACK NETWORK ELEMENT X-CONN MOUNTG SHELF POSITION 1-16 X-CONN C UP TO 450 FT. (137.2 M) UP TO 450 FT. (137.2 M) Figure PIOR Module Cabling Diagram Page 3-15

29 ADCP Issue 3 August 2000 Section 3: Description 5.3 Signal Connections A block diagram of the PIOR module is shown in Figure The paired PIOR modules are installed in adjacent odd-even mounting positions in the chassis. All the DS3 or STS-1 signal connections to the pair of PIOR modules are made through 75-ohm BNC connectors of the odd-numbered mounting position on the chassis backplane. (The BNC connectors associated with the even-numbered mounting positions are left unused.) The signals are passed through the chassis to the pair of modules via the 96-pin connectors located within the chassis and the 96-pin mating connector located on the rear of the modules. Two front panel midsize coaxial monitor (MON) jacks permit non-intrusive testing of the channel A and channel B outputs. / CABLE TERFACE A REGEN A FRONT PANEL MIDSIZE JACKS MOUNTG CHASSIS BACKPLANE BNC CONNECTORS CHANNEL A A MON LBO SWITCHES CHANNEL B B REGEN B MON MOUNTG CHASSIS BACKPLANE BNC CONNECTORS B FRONT PANEL LEDS POWER AND ALARM TERFACE FRONT PANEL CHANNEL SELECT SWITCH FRONT PANEL STS1/DS3 MODE SWITCH POWER CHANNEL A TX LOS 48 VDC RTN A 48 VDC A 48 VDC B 48 VDC RTN B POWER SUPPLY CONTROL CIRCUIT RX LOS ON LE OPT ERR MOUNTG CHASSIS SCREWDOWN TERMAL MAJ ALRM NO MAJ ALRM COM M ALRM NO M ALRM COM ALARM RELAYS CHANNEL B TX LOS RX LOS Figure DS3/STS-1 PIOR Block Diagram 8313-D Page 3-16

30 ADCP Issue 3 August 2000 Section 3: Description 5.4 Switching Capabilities A fault condition within a PIOR module will cause the regenerator function to switch to its partner (protect) module. A green ON LE LED on the front panel of the module identifies which of the PIOR modules is operating in the working mode. Table 3-5 lists the various switching criteria for the PIOR modules. The switching function can also be performed manually by pressing the SELECT pushbutton on the PIOR module desired to be brought on line. The SELECT pushbutton is located on the front panel of the module and is recessed to prevent inadvertent activation. Table 3-5. PIOR Switching Criteria CONDITIONS PIOR 1 PIOR 2 WHICH MODULE IS ON-LE? 1. Normal Normal Whichever one comes up first. 2. Normal Fault PIOR 1 3. Fault Normal PIOR 2 4. Fault Fault No change. Note: Fault condition = one or all of the following conditions: Loss of 48 Vdc battery power On-board power failure Transmitter failure 5.5 Power Connections The 48 Vdc office battery power is applied from the chassis backplane through the 96-pin connector located on the rear panel of the repeater module. An onboard DC-to-DC converter within each repeater module produces the voltage required to power the regeneration circuits. An internal non-user-replaceable fuse within each repeater module provides overcurrent protection should an internal failure cause the repeater to draw excessive current. 5.6 Front Panel LEDs A green POWER LED on the front panel of each repeater indicates whenever the repeater module is powered. The alarm indicators on the PIOR module include the front panel OPT ERR (option error), RX LOS (receive loss of signal) and TX LOS (transmit loss of signal) LEDs. If the OPT ERR LED indication on the online or working PIOR module is anything other than green, the minor alarm relay also closes. See Table 7-1 for descriptions of the conditions indicated when the OPT ERR LED is either yellow, red, or off. Loss of input signal to a channel A or channel B causes the associated RX LOS LED to light yellow and closes the module minor alarm relay. Loss of a channel s output signal in the presence of an input signal causes the associated TX LOS LED to light red and closes the module major alarm relay, assuming the protect partner module is operating. Table 3-6 lists the PIOR module LED colors and their corresponding conditions. Page 3-17

31 ADCP Issue 3 August 2000 Section 3: Description Table 3-6. PIOR Front Panel LEDs COLOR/CONDITION GREEN YELLOW DARK RED POWER CHANNEL A TX LOS RX LOS ON LE OPT ERR CHANNEL B TX LOS RX LOS A POWER LED CH A TX LOS CH A RX LOS ON LE Normal N/A Loss of 48 Vdc Loss of +5 Vdc N/A N/A Normal Transmit Loss of Signal N/A Receive Loss Normal N/A of Signal Module is Online N/A OPT ERR Normal Loss of communication with Protect Partner CH B TX LOS CH B RX LOS Module is not Online N/A N/A LBO or Mode Select switch does not match Protect Partner N/A N/A Normal Transmit Loss of Signal N/A Receive Loss Normal N/A of Signal 5.7 Mode Selection STS-1 or DS3 repeater operation is set by the STS1/DS3 mode selection switch recessed into the front panel of the repeater module. 5.8 Line Build-Out The LBO switches are recessed into the top panel of the PIOR repeater module. Refer to Table 3-7 to determine whether the switches should be set to SHORT or LONG and set the switches accordingly. The information in Table 3-7 is also provided on the side cover of the module. On protect-partner pairs of PIOR modules, the LBO switches on both modules must agree; otherwise, the OPT ERR LED on the online module will light red when both paired modules are installed in the chassis and powered up. Note: The maximum cable lengths described in section 5.2 must not be exceeded. Page 3-18

32 ADCP Issue 3 August 2000 Section 3: Description CABLE TYPE Table 3-7. PIOR Maximum Allowable Repeater Cable Lengths DS3/STS-1 DS3 STS-1 PUT CABLES ft. (137.2 m) 734A 735A RG ft. (137.2 m) 225 ft. (0 to 68.6 m) 335 ft. (102.1 m) PUT CABLES (SHORT) 200 ft. (61.0 m) 200 ft. (61.0 m) 100 ft. (30.5 m) 150 ft. (45.7 m) PUT CABLES (LONG) 450 ft. (137.2 m) 450 ft. (137.2 m) 225 ft. (68.6m) 335 ft. (102.1m) PUT CABLES (SHORT) 125 ft. (38.1 m) 125 ft. (38.1 m) 60 ft. (18.3 m) 90 ft. (27.4 m) PUT CABLES (LONG) 450 ft. (137.2 m) 450 ft. (137.2 m) 225 ft. (68.6 m) 335 ft. (102.1 m) 6 BOR MODULE 6.1 General The DS3/STS-1 Dual Bridging Office Repeater (BOR) Modules shown in Figure 3-15 and Figure 3-16 are used in ADC s Digital Cross-Connect System (DSX-3) when in-service rerouting or patching of DS3 or STS-1 signals is required at the DSX-3 bay. The maximum length allowed for cross-connect cables between DSX-3 bays is a function of the cable type selected and the operating mode as shown in Table 3-8. The maximum allowed input and output cable length between a DSX bay and a network element is also a function of the cable type selected and the operating mode as shown in Table 3-8. These distances should be used as general approximations for system planning. Actual distances will vary depending on the loss characteristics of the specific cable used. The BOR module consists of a printed circuit board, front panel, and sheet metal enclosure. The catalog number of the repeater is printed on the front panel for identification purposes, and the common language equipment identifier (CLEI) label is also mounted on the front panel. The BOR module has a separate monitor (MON) jack for each channel (A and B). The DS3/STS-1 mode select switch and all visual indicators (LEDs) are on the repeater front panel. (The mode select switch is recessed into the front panel to prevent inadvertent activation.) Functions of all the front panel indicators, switches, and coaxial jacks are listed in Table 7-1. Page 3-19

33 ADCP Issue 3 August 2000 Section 3: Description DS3/STS POWER CHANNEL A TX LOS RX LOS MON STS1 DS3 CHANNEL B TX LOS RX LOS MON CODE CAT # DATE S/N MADE USA 8977-B RP3-B10000 Figure DS3/STS-1 BOR Module Page 3-20

34 A B ADCP Issue 3 August 2000 Section 3: Description LONG COL LBO SHORT COL DS3/STS POWER CHANNEL A TX LOS RX LOS MON STS1 DS3 CHANNEL B TX LOS RX LOS MON CODE CAT # DATE S/N MADE USA A RP3-B20000 Figure DS3/STS-1 BOR Module with Short/Long Cable Selection Table 3-8. BOR Cross-Connect/Network Equipment Cable Lengths COAXIAL CABLE TYPE MAXIMUM LENGTH OF CROSS-CONNECT CABLES DS3 MODE 728 Not Used 734A Not Used 735A 20.6 ft. (6.3 m) RG ft. (8.0 m) TRIAX 13.5 ft (4.1 m) STS-1 MODE Not Used Not Used 18.0 ft. (5.5 m) 23.9 ft. (7.3 m) 12.5 ft. (3.8 m) MAXIMUM LENGTH OF EQUIPMENT CABLES DS3 MODE ft. (137.2 m) ft (144.2 m) ft. (68.6 m) ft. (102.4 m) Not Used STS-1 MODE ft. (127.4 m) ft (134.1 m) ft. (65.5 m) ft. (96.6 m) Not Used Page 3-21

35 ADCP Issue 3 August 2000 Section 3: Description 6.2 Application The DS3/STS-1 Dual Bridging Office Repeater (BOR) Module is used to patch a signal from the monitor jack (MON) on a DSX-3 module through the repeater to the jack on a second DSX-3 module. The Dual BOR module has two regenerators (channel A and channel B) for patching bi-directional or unidirectional signals. The maximum cable distance allowed between the BOR repeater and a DSX-3 bay, or between the BOR repeater and a network element, is defined by the cable type selection, the setting of the channel A and B line build-out (LBO) switches (see section 6.7), and the operating mode selection (see section 6.6). The first application shown in Figure 3-17 illustrates a repeater situated between two DSX-3 bays. This application allows a maximum cable separation of 900 feet (274.3 meters) between bays. The second application in Figure 3-17 illustrates a repeater situated between a DSX-3 bay and a network element, such as a multiplexer (Mux) or a digital cross-connect system (DCS). This application allows a maximum cable separation of 1,350 feet (411.5 meters) between the bay and the network element. DSX-3 DS3/STS-1 BRIDGG OFFICE REPEATER DSX-3 A X X B 900 FEET (274.3 M) MAXIMUM DS3 "SHORT" DISTANCE X: 0 FT. TO 200 FT. (0 M TO 61 M) DS2 "LONG" DISTANCE X: 200 FT. TO 450 FT. (60 M TO M) STS-1 "SHORT" DISTANCE X: 0 FT. TO 125 FT. (0 M TO 38.1 M) STS-1 "LONG" DISTANCE X: 125 FT. TO 450 FT. (38.1 M TO M) DSX-3 BAY TO DSX-3 BAY DSX-3 DS3/STS-1 BRIDGG OFFICE REPEATER MUX OR DCS A X X 450 FEET B 1350 FEET (411.5 M) MAXIMUM DS3 "SHORT" DISTANCE X: 0 FT. TO 200 FT. (0 M TO 61 M) DS2 "LONG" DISTANCE X: 200 FT. TO 450 FT. (60 M TO M) STS-1 "SHORT" DISTANCE X: 0 FT. TO 125 FT. (0 M TO 38.1 M) STS-1 "LONG" DISTANCE X: 125 FT. TO 450 FT. (38.1 M TO M) DSX-3 BAY TO NETWORK ELEMENT C Figure BOR Module Applications Page 3-22

36 ADCP Issue 3 August 2000 Section 3: Description Typical in-service patch procedures are illustrated in Figure 3-18 and described in Section 4 of this manual. Caution: In-service patching at DSX-3 circuit modules may result in a momentary hit that will cause reframes. These are usually short enough to avoid loss of service. Data transmission may be affected; therefore, proper precautions should be taken when circuit patching is required. DS3/STS-1 SIGNAL DSX M O I DSX M O I PRIMARY OR EXISTG FACILITY OFFICE B M DSX M O I STANDBY OR NEW FACILITY O I I O DS3/STS-1 DUAL BRIDGG OFFICE REPEATER DS3/STS-1 SIGNAL DSX M O I DSX M O I OFFICE A M DSX M O I O I NOTES: M = Monitor O = Output I = Input I O DS3/STS-1 DUAL BRIDGG OFFICE REPEATER 8901-B Figure In-Service Patching to Bypass a Primary Facility (BOR) 6.3 Signal Connections All the DS3 or STS-1 signal connections to the BOR module are made through midsize coaxial jacks on the front panel of the module. Two front panel midsize coaxial monitor (MON) jacks provide non-intrusive testing of the channel A and channel B outputs. Table 3-9 lists the maximum allowable input and output distances for various types of cable when configuring the RP3-B10000 BOR module. (This information is also provided on the side cover of the module.) To determine the maximum allowable cable lengths for the RP3- B20000 BOR module, refer to section 6.7. A block diagram of the BOR module is shown in Figure Page 3-23

37 ADCP Issue 3 August 2000 Section 3: Description Table 3-9. BOR Maximum Allowable Cable Lengths (RP3-B10000 Only) BOR PUT CABLES BOR PUT CABLES CABLE TYPE DS3/STS-1 DS3 STS A 735A RG ft (61.0 m) 200 ft. (61.0 m) 100 ft. (30.5 m) 150 ft. (45.7 m) 200 ft. (61.0 m) 200 ft. (61.0 m) 100 ft. (30.5 m) 150 ft. (45.7 m) 125 ft (38.1 m) 125 ft. (38.1 m) 60 ft. (18.3 m) 90 ft. (27.4 m) FRONT PANEL MIDSIZE JACKS FRONT PANEL MIDSIZE JACKS MON A A MON B REGEN A LBO SWITCHES (RP3-B20000 ONLY) A B REGEN B B FRONT PANEL LEDS POWER AND ALARM TERFACE FRONT PANEL STS1/DS3 MODE SWITCH POWER CHANNEL A 48 VDC RTN A TX LOS 48 VDC A 48 VDC B POWER SUPPLY CONTROL CIRCUIT RX LOS 48 VDC RTN B CHANNEL B MOUNTG CHASSIS SCREWDOWN TERMAL MAJ ALRM NO TX LOS RX LOS MAJ ALRM COM M ALRM NO ALARM RELAYS M ALRM COM 8315-D Figure DS3/STS-1 BOR Block Diagram Page 3-24

38 ADCP Issue 3 August 2000 Section 3: Description 6.4 Power Connections The 48 Vdc office battery power is applied from the chassis backplane through the 96-pin connector located on the rear panel of the repeater module. An onboard DC-to-DC converter within each repeater module produces the voltage required to power the regeneration circuits. An internal non-user-replaceable fuse within each repeater module provides over-current protection should an internal failure cause the repeater to draw excessive current. 6.5 Front Panel LEDs A green POWER LED on the front panel of each repeater indicates whenever the repeater module is powered. The alarm indicators on the BOR module include the front panel RX LOS (loss of input signal) and TX LOS (loss of output signal) LEDs. Loss of input signal to channel A or channel B causes the associated RX LOS LED to light yellow and closes the module minor alarm relay. Loss of a channel output signal in the presence of an input signal causes the associated TX LOS LED to light red and closes the module major alarm relay. Table 3-10 lists the BOR module LED colors and their corresponding conditions. Table BOR Front Panel LEDs POWER COLOR/CONDITION CHANNEL A TX LOS RX LOS CHANNEL B TX LOS RX LOS POWER LED CH A TX LOS CH A RX LOS CH B TX LOS CH B RX LOS GREEN YELLOW DARK RED Normal N/A Loss of 48 Vdc Loss of +5 Vdc N/A N/A Normal Transmit Loss of Signal N/A Receive Loss Normal N/A of Signal N/A N/A Normal Transmit Loss of Signal N/A Receive Loss Normal N/A of Signal A 6.6 Mode Selection STS-1 or DS3 repeater operation is set by the STS1/DS3 mode select switch recessed into the front panel of the repeater module. 6.7 Line Build-Out (RP3-B20000 Repeater Module Only) The LBO switches are recessed into the top panel of the BOR repeater module. Refer to Table 3-11 to determine whether the switches should be set to SHORT or LONG and set the switches accordingly. The information in Table 3-11 is also provided on the side cover of the module. Note: The maximum cable lengths described in section 6.2 must not be exceeded. Page 3-25

39 ADCP Issue 3 August 2000 Section 3: Description CABLE TYPE Table BOR Maximum Allowable Repeater Cable Lengths DS3/STS-1 DS3 STS-1 PUT CABLES ft. (137.2 m) 734A 450 ft. (137.2 m) 735A 225 ft. (68.6 m) RG ft. (102.1 m) PUT CABLES (SHORT) 200 ft. (61.0 m) 200 ft. (61.0 m) 100 ft. (30.5 m) 150 ft. (45.7 m) PUT CABLES (LONG) 450 ft. (137.2 m) 450 ft. (137.2 m) 225 ft. (68.6 m) 335 ft. (102.1m) PUT CABLES (SHORT) 125 ft. (38.1 m) 125 ft. (38.1 m) 60 ft. (18.3 m) 90 ft. (27.4 m) PUT CABLES (LONG) 450 ft. (137.2 m) 450 ft. (137.2 m) 225 ft. (68.6 m) 335 ft. (102.1 m) 7 PBOR MODULES 7.1 General The DS3/STS-1 Dual Protected Bridging Office Repeater (PBOR) Module shown in Figure 3-20 is used in ADC s digital cross-connect system (DSX-3) when in-service rerouting or patching of DS3 or STS-1 signals at the DSX-3 bay is required. The protection feature inserts a redundant regenerator into the single data path provided by the PBOR module to ensure continuous service on the DS3 or STS-1 circuit. The maximum length allowed for cross-connect cables between DSX-3 bays is a function of the cable type selected and the operating mode as shown in Table The maximum allowed input and output cable length between a DSX bay and a network element is also a function of the cable type selected and the operating mode as shown in Table These distances should be used as general approximations for system planning. Actual distances will vary depending on the loss characteristics of the specific cable used. The PBOR module consists of a printed circuit board, front panel, and sheet metal enclosure. The catalog number of the repeater is printed on the front panel for identification purposes, and the common language equipment identifier (CLEI) label is also mounted on the front panel. The PBOR module has a monitor (MON) jack on the output of the on-line regenerator (circuit 1 or circuit 2). The DS3/STS-1 mode select switch and all visual indicators (LEDs) are on the repeater front panel. (The mode select switch is recessed into the front panel to prevent inadvertent activation.) Functions of all the front panel indicators, switches, and coaxial jacks are listed in Table 7-1. Page 3-26

40 ADCP Issue 3 August 2000 Section 3: Description DS3/STS POWER ON LE CIRCUIT 1 TX LOS RX LOS MON SELECT STS1 DS3 CIRCUIT 2 ON LE TX LOS RX LOS CODE CAT # DATE S/N MADE USA 8975-B RP3-G10000 Figure DS3/STS-1 PBOR Module Power Connections Table PBOR Cross-Connect/Network Equipment Cable Lengths COAXIAL CABLE TYPE MAXIMUM LENGTH OF CROSS-CONNECT CABLES DS3 MODE 728 Not Used 734A Not Used 735A 20.6 ft. (6.3 m) RG ft. (8.0 m) TRIAX 13.5 ft (4.1 m) STS-1 MODE Not Used Not Used 18.0 ft. (5.5 m) 23.9 ft. (7.3 m) 12.5 ft. (3.8 m) MAXIMUM LENGTH OF EQUIPMENT CABLES DS3 MODE ft. (137.2 m) ft (144.2 m) ft. (68.6 m) ft. (102.4 m) Not Used STS-1 MODE ft. (127.4 m) 440v ft (134.1 m) ft. (65.5 m) ft. (96.6 m) Not Used Page 3-27

41 ADCP Issue 3 August 2000 Section 3: Description 7.2 Application The DS3/STS-1 PBOR module is used in the same applications as the BOR module; to regenerate a DS3 or STS-1 signal from a DSX-3 monitor (MON) jack when in-service rerouting or patching of that signal is required at the DSX-3 bay. The PBOR module has two regenerators providing the working and standby function for a single DS3 or STS-1 data path. Two PBOR modules are required to regenerate bi-directional DS3 or STS-1 communication. Each PBOR module contains two regenerators (labeled CIRCUIT 1 and CIRCUIT 2), one regenerator operating in the working mode and the second regenerator operating in the protect mode. Should a fault condition occur in the working circuit, the protect circuit takes over the regeneration of the incoming signal. A green ON-LE LED on the module front panel indicates which PBOR circuit (1 or 2) is operating in the working mode. The other PBOR circuit can be forced online by pressing the module's front panel SELECT pushbutton with a fine tipped tool or a pencil. A typical in-service patch is illustrated in Figure 3-21 and described in Section 7 of this manual. Caution: In-service patching at DSX-3 circuit modules may result in a momentary hit that will cause reframes. These are usually short enough to avoid loss of service. Data transmission may be affected; therefore, proper precautions should be taken when circuit patching is required. DS3/STS-1 SIGNAL DSX M O I DSX M O I PRIMARY OR EXISTG FACILITY OFFICE B M M DSX M O I STANDBY OR NEW FACILITY I O O I DS3/STS-1 PBOR DS3/STS-1 PBOR DS3/STS-1 SIGNAL DSX M O I DSX M O I DSX M OFFICE A M M O I I O O I NOTES: M = Monitor O = Output I = Input DS3/STS-1 PBOR DS3/STS-1 PBOR 9136-A Figure In-Service Patching to Bypass a Primary Facility (PBOR) Page 3-28

42 ADCP Issue 3 August 2000 Section 3: Description 7.3 Signal Connections A block diagram of the PBOR module is provided in Figure All DS3 or STS-1 signal connections to the PBOR module are made through midsize coaxial jacks on the front panel of the module. The front panel midsize coaxial monitor (MON) jack provides non-intrusive testing of the output of the working regenerator (circuit 1 or circuit 2). Table 3-13 lists the maximum allowable input and output distances for various types of cable. (This information is also provided on the side cover of the module.) FRONT PANEL MIDSIZE JACK FRONT PANEL MIDSIZE JACKS SELECT RELAY MON CIRCUIT 1 CIRCUIT 2 FRONT PANEL LEDS POWER AND ALARM TERFACE FRONT PANEL CIRCUIT SELECT SWITCH FRONT PANEL STS1/DS3 MODE SWITCH POWER CIRCUIT 1 ON LE 48 VDC RTN A TX LOS 48 VDC A 48 VDC B POWER SUPPLY CONTROL CIRCUITS RX LOS 48 VDC RTN B MOUNTG CHASSIS SCREWDOWN TERMAL MAJ ALRM NO CIRCUIT 2 ON LE TX LOS MAJ ALRM COM RX LOS M ALRM NO ALARM RELAYS M ALRM COM 8314-G Figure DS3/STS-1 PBOR Block Diagram Page 3-29