Practice Section 1559 Issue 1, March 2004 DS3 TO DS1 MULTIPLEXER FAMILY D3-28D1 AND D3-14D1 UNITS Multiple Patents Pending CONTENTS PAGE 1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . 1 A. Reason for Reissue . . . . . . . . . . . . . . . . . . 1 B. Description. . . . . . . . . . . . . . . . . . . . . . . . . 2 C. Features. . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . 3 3. FUNCTIONAL DESCRIPTION. . . . . . . . . . . . . 4 A. DS3 Circuitry . . . . . . . . . . . . . . . . . . . . . . . 4 B. DS1 Circuitry . . . . . . . . . . . . . . . . . . . . . . . 5 C. Local Alarms . . . . . . . . . . . . . . . . . . . . . . . 5 4. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 5 A. Front-Panel Features. . . . . . . . . . . . . . . . . 5 B. Backplane Features. . . . . . . . . . . . . . . . . . 8 C. Module Insertion . . . . . . . . . . . . . . . . . . . . 9 5. OAM&P MANAGEMENT . . . . . . . . . . . . . . . . 11 A. Performance Monitoring . . . . . . . . . . . . . 11 B. Alarm and Configuration Status. . . . . . . . 11 C. Maintenance and Diagnostics . . . . . . . . . 12 D. Provisioning Mechanism . . . . . . . . . . . . . 13 E. Loopbacks . . . . . . . . . . . . . . . . . . . . . . . . 14 6. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . 18 7. CUSTOMER SERVICE . . . . . . . . . . . . . . . . . 20 Figure 1. D3-28D1 and D3-14D1 1. INTRODUCTION ® This practice describes the Pulsecom D3-28D1 and D3-14D1 DS3 to DS1 Multiplexer Family, shown in Figure 1. Installation instructions and engineering references are included. A. Reason for Reissue The D3-28D1 and D3-14D1 units are released to full production. Trademarks used in this manual: AMP and CHAMP are trademarks of AMP Inc. CLEI is a trademark of Telcordia Technologies, Inc. Pulsecom is a registered trademark of Hubbell Inc. ©2004 Pulse Communications Inc. All rights reserved. 1 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 B. Description The multiplexers are plug-in cards that can be installed in Pulsecom Type 600 or Type 400 mechanics shelves. They multiplex 14 or 28 DS1 signals into a DS3 signal and demultiplex a DS3 signal to 14 or 28 DS1 signals. Four versions are available as shown in Table 1. Table 1. Multiplexer Versions Integral T1 Repeaters and DS1 Network Typical Interface Unit (NIU) CLEI™ Model Description Mechanics Mounting Loopback Capability Code D3-28D1 DS3 to 28 DS1s Type 600 3GME No DMC3DE0C D3-28D1SJ DS3 to 28 DS1s Type 600 3GME Yes DMC3DEAC D3-14D1 DS3 to 14 DS1s Type 400 3GME or No DMC3DF0C 2O3D3-19 D3-14D1SJ DS3 to 14 DS1s Type 400 3GME or Yes DMC3DFAC 2O3D3-19 NOTE Unless otherwise stated, for the remainder of this document “D3-28D1” refers generically to any of the models listed above. The D3-28D1provides two kinds of management interfaces: • The CRAFT port on the front panel connects to a PC using VT-100 terminal emulation. • The RS-232 asynchronous network management port on the backplane uses TL-1 messages for maintenance and diagnostic functions. C. Features The D3-28D1 provides the following features: • Industry’s smallest, self-contained DS3 to DS1 or T1 multiplexer • “SJ” versions that support 6000 ft. T1 circuits • Drop-and-continue capability optimized for efficient access [for example, a single digital cross-connect system (DCS) or next generation digital loop carrier (NGDLC) DS3 port can deliver four DS1s or T1s to seven different sites] • Available support for standard in-band DS1 NIU loopbacks as well as integral T1 repeaters (SJ-suffix versions) to eliminate the need for external “smart jacks” • Available support for in-band loopback codes issued on either the DS1 side or the DS3 side to suit comprehensive network diagnostics • Outside plant (OSP) climate hardening 2 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 • Robust lightning protection to withstand the rigors of cell site applications • OSP, central office (CO), and customer-premises equipment (CPE) mountings with provision for complementary Pulsecom O3D3 and O3-3D3 miniature synchronous optical network (SONET) multiplexers and wave division multiplexer (WDM) units as well as Pulsecom DS3-EXPRESS (DS3 over four twisted pairs) circuit packs • Simple, intuitive CRAFT port provisioning and pre-assigned defaults for common applications to assure fast, trouble-free turn-up • Full-time TL-1 communication link • Comprehensive performance monitoring (PM) that eliminates the cost of external DS3 NIUs and delivers single-point platform diagnostics • Type 400 mechanics 14 DS1 versions and Type 600 mechanics 28 DS1 versions • Front-panel DS3, DS1, and UNIT status LEDs • Front-panel DS3 IN and DS3 OUT 75-ohm coaxial connectors TM • Front-panel DS1 64-pin AMP connector(s) 2. APPLICATIONS Figure 2 shows typical D3-14D1 applications. Legacy D3-14D1 D3-14D1 D3-14D1 D3-14D1 ADM Mux 4 DS1s 10 DS1s 8 DS1s 6 DS1s 3GME Mounting A. Intra-Building DS1 Distribution Cell Site #1 Cell Site #2 Cell Site #3 O3-3D3 O3-3D3 O3-3D3 & & & WDM WDM WDM D3-14D1 D3-14D1 D3-14D1 4 DS1s 14 DS1s 10 DS1s & 2 DS3 & 1 DS3 & 2 DS3 3GME Mounting B. Single-Pair Fiber 3GME Cell Site Support Figure 2. Typical Applications 3 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 DS1 Interface DS1 Interface DS3 DS1 Interface Interface DS1 Interface DS1 Interface Flash Memory DS1 Interface D3-28D1 CPU Serial Craft Port Port 1 Serial Network Port 2 Management Port DS1 Interface Clock -48 VDC Soft Start Power Supply 48V Return 10-msec Holdup Figure 3. D3-28D1 Functional Block Diagram 3. FUNCTIONAL DESCRIPTION Up to 28 DS1 circuits are combined into a single DS3 signal. The D3-28D1 performs multiplexing transparently (no modification of DS1 payload). Figure 3 shows a functional block diagram. A. DS3 Circuitry The DS3 interface is compliant with GR-499-CORE Section 9.6, Table 9-15. It detects alarm indication signal, remote defect indicator, and IDLE signal per GR-499-CORE Sections 10.5, 18.2, and 18.3. The DS3 transmitting pulse template meets T1.404. The interface supports bipolar with 3-zero substitution (B3ZS) line code and M-Frame and C-bit parity framing formats. See Section 5 [Operation, Administration, Maintenance, and Provisioning (OAM&P) Management] for DS3 loopback information. 4 Protection D3-28D1 and D3-14D1 1559, Issue 1, March 2004 B. DS1 Circuitry Each DS1 is provisioned for alternate mark inversion (AMI) or bipolar with 8-zero substitution (B8ZS) line coding. Each DS1 is transparent to frame format. For example, superframe (SF), extended superframe (ESF), or TR-08 formats can be carried without changing provisioning at the D3-28D1. Each DS1 pulse template meets ANSI T1.102. Each DS1 port is provisioned for digital signal cross-connect (DSX-1) type interface (short haul), with line build-outs (LBOs) appropriate to service line lengths from 0 to 655 feet. Each DS1 port of the D3-28D1SJ and D3-14D1SJ may also be provisioned for long-haul (T1) applications; the transmit attenuation in these versions is also selectable for 0, 7.5, 15, or 22.5 dB. The D3-28D1 detects loss of signal, all ones (alarm indication signal), and line code violations for each DS1 on the low-speed (DS1) side. See Section 5, OAM&P Management, for DS1 loopback information. C. Local Alarms There are two alarm relays on the D3-28D1. The DS3 alarm contacts close for a DS3 loss of signal or loss of frame. The DS1 alarm contacts close for loss of signal on any DROP (in-service) DS1 port. Both DS3 and DS1 alarm contacts close for a loss of power or unit failure. 4. INSTALLATION WARNING This unit includes components that are susceptible to damage from static electricity. DO NOT handle units without protection from electrostatic discharge. A. Front-Panel Features The front panel of the D3-28D1 provides connection to the DS3 and DS1 signals as well as the CRAFT port. LEDs show connector and unit status. Front-panel connectors and indicators are shown in Figure 1 and described in Table 2. Each DS1 connector has 14 transmit (Tx) pairs and 14 receive (Rx) pairs. Front-panel DS1 pinouts are listed in Table 3. The front-panel DB-9 communications interface is an asynchronous VT-100 serial port. This CRAFT port operates at 9600 baud with 8 bits of data, no parity, and 1 stop bit. Connector pin assignments are shown in Figure 4. 5 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 Table 2. D3-28D1 Front-Panel Connectors and Indicators Connector Function TM DS1 1-14 64-pin AMP CHAMP (female) connector with 14 DS1 (1-14) interfaces: 14 Tx pairs and 14 Rx pairs. DS1 15-28 64-pin AMP CHAMP (female) connector with 14 DS1 (15-28) interfaces: 14 Tx pairs and 14 Rx pairs (only on D3-28D1 and D3-28D1SJ versions). DS3 IN 75-ohm coaxial connector. DS3 OUT 75-ohm coaxial connector. CRAFT RS-232, DB-9, female port. Indicator Function UNIT Lights red to show unit failure. Lights green to show normal unit operation. DS3 Lights red to show loss of signal or loss of framing on the incoming DS3. Lights yellow to show that a remote alarm has been detected on the DS3 such as alarm indication signal, IDLE, or remote defect indication. Lights green to show that the DS3 signal is connected and operating properly. Flashes green to show that a DS3 loopback has been activated. DS1 Lights red to show a loss of signal on any DROP (in-service) DS1. Lights yellow to show that an alarm indication signal (unframed all ones) has been detected on any of the DROP (in-service) DS1s. Lights green to show that all DROP (in-service) DS1s are operating properly. Flashes green to show that one or more DS1 loopbacks have been activated. 1 x 6 RTS 2 Tx 7 x 3 Rx 8 CTS 4 x 9 x 5 Figure 4. CRAFT Port Pin Assignments 6 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 Table 3. Front-Panel DS1 Connector Pin Assignments DS1 1-14 DS1 15-28 Signal Signal Signal Signal Pin (Tip) Pin (Ring) Pin (Tip) Pin (Ring) 1 Tx1 33 Tx1 1 Tx15 33 Tx15 2 Tx2 34 Tx2 2 Tx16 34 Tx16 3 Tx3 35 Tx3 3 Tx17 35 Tx17 4 Tx4 36 Tx4 4 Tx18 36 Tx18 5 Tx5 37 Tx5 5 Tx19 37 Tx19 6 Tx6 38 Tx6 6 Tx20 38 Tx20 7 Tx7 39 Tx7 7 Tx21 39 Tx21 8 Tx8 40 Tx8 8 Tx22 40 Tx22 9 Tx9 41 Tx9 9 Tx23 41 Tx23 10 Tx10 42 Tx10 10 Tx24 42 Tx24 11 Tx11 43 Tx11 11 Tx25 43 Tx25 12 Tx12 44 Tx12 12 Tx26 44 Tx26 13 Tx13 45 Tx13 13 Tx27 45 Tx27 14 Tx14 46 Tx14 14 Tx28 46 Tx28 15 Frame GND 47 Frame GND 15 Frame GND 47 Frame GND 16 Rx1 48 Rx1 16 Rx15 48 Rx15 17 Rx2 49 Rx2 17 Rx16 49 Rx16 18 Rx3 50 Rx3 18 Rx17 50 Rx17 19 Rx4 51 Rx4 19 Rx18 51 Rx18 20 Rx5 52 Rx5 20 Rx19 52 Rx19 21 Rx6 53 Rx6 21 Rx20 53 Rx20 22 Rx7 54 Rx7 22 Rx21 54 Rx21 23 Rx8 55 Rx8 23 Rx22 55 Rx22 24 Rx9 56 Rx9 24 Rx23 56 Rx23 25 Rx10 57 Rx10 25 Rx24 57 Rx24 26 Rx11 58 Rx11 26 Rx25 58 Rx25 27 Rx12 59 Rx12 27 Rx26 59 Rx26 28 Rx13 60 Rx13 28 Rx27 60 Rx27 29 Rx14 61 Rx14 29 Rx28 61 Rx28 30 — 62 — 30 — 62 — 31 — 63 — 31 — 63 — 32 Frame GND 64 Frame GND 32 Frame GND 64 Frame GND 7 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 B. Backplane Features The backplane communications interface is an RS-232 asynchronous 9600-baud serial network management port that supports TL-1 messaging. Backplane pinouts for the TL-1 message port, local alarm contacts, power, and ground (GND) are listed in Table 4. The D3-14D1 also supports the rear-panel DS3 connections listed in Table 4 when installed in the 2O3D3-19 shelf. Table 4. Backplane Pin Assignments Signal Signal Pin Description Direction Pin Description Direction 56 Signal GND (SG) OUT 55 Request To Send (RTS) OUT 54 — — 53 — — 52 — — 51 — — 50 — IN 49 Clear To Send (CTS) IN 48 — — 47 DS1 Alarm Contact Bidirectional 46 — — 45 — — 44 — — 43 — — 42 — — 41 DS1 Alarm Contact Bidirectional 40 — — 39 — — 38 — — 37 — — 36 — — 35 –48 VDC IN 34 — OUT 33 — OUT 32 — OUT 31 — OUT 30 — — 29 — — 28 — — 27 Chassis GND IN 26 — IN 25 — IN 24 — IN 23 — IN 22 DS3 Rx Return — 21 — — 20 DS3 Rx Signal — 19 — — 18 — — 17 –48V Return — 16 DS3 Tx Return IN 15 Rx Data (RD) — 14 DS3 Tx Signal — 13 DS3 Alarm Contact Bidirectional 12 — — 11 — — (Continued on next page) 8 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 Table 4. Backplane Pin Assignments (Continued) Signal Signal Pin Description Direction Pin Description Direction 10 — — 9 — — 8 — — 7 DS3 Alarm Contact Bidirectional 6 — OUT 5 Tx Data (TD) OUT 4— — 3 — — 2 — — 1 Chassis GND IN NOTE 1: TD, RD, CTS, and RTS are RS-232 signals. NOTE 2: SG is signal ground for the RS-232 interface. NOTE 3: The DS3 interface may be provisioned to appear on the front panel or the backplane. The unit is shipped provisioned for front-panel DS3 access. C. Module Insertion Follow Procedure 1 and Figure 5 to install the units in Pulsecom mountings. Procedure 1. Installing the Multiplexers STEP ACTION 1 A) Plug D3-28D1 or D3-28D1SJ units into the 3GME mounting; refer to Pulsecom Practice Section 1558. OR B) Plug D3-14D1 or D3-14D1SJ units into the 3GME or 2O3D3-19 mountings; see Practice Section 1558 or 1550, respectively. 2 Wire alarm leads to the mountings according to the above practices and Table 4. 3 Connect DS3 cables according to Table 2. 4 Locate the hardware kit containing nylon tie mounts, cable ties, spacers, #4–40 x 1/4" screws, and #4–40 x 0.425" captive screws for securing the customer-supplied mating 64-pin AMP CHAMP connector(s) to the front-panel connector(s). Refer to Table 3. 5 A) For D3-14D1 or D3-14D1SJ units, refer to Figure 5A. Determine the type of connector to be used (“right angle” shown on top left side or “horizontal” shown on bottom left side). Then select the appropriate hardware for installing the desired connector. B) For D3-28D1 or D3-28D1SJ units, refer to Figure 5B. Determine the type of connector to be used (“right angle” shown on top left side or “horizontal” shown on bottom left side). Then select the appropriate hardware for installing the desired connectors. 9 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 A. D3-14D1 and D3-14D1SJ Connector Installation B. D3-28D1 and D3-28D1SJ Connector Installation NOTE: 64-pin plug is Pulsecom part number (P/N) 003397-0042 or AMP P/N 552285-1. Right-angle connector hood is Pulsecom P/N 003397-0053 or AMP P/N 552496-1. Horizontal connector hood is Pulsecom P/N 9967-9404 or AMP P/N 552082-1. Figure 5. DS1 Connector Installation 10 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 5. OAM&P MANAGEMENT A. Performance Monitoring For each DS1 received from the network (DS3) direction, loopback can be controlled via the far-end alarm and control (FEAC) channel. For each DS1 received from the customer direction, the following performance information is available: • LOS (loss of signal) • LCV (line code violations, in the current 15-minute block) • AIS (alarm indication signal, unframed all ones) The performance history of each DS1 or T1 is available for the last 15 minutes, 24 hours, and 7 days. The following performance data is collected: • ES (errored seconds) • SES (severely errored seconds) • UAS (unavailable seconds) • LCV The DS3’s performance history is similar to the DS1. The DS3 performance monitoring is defined by: • ES • SES • UAS • LCV • Parity errors B. Alarm and Configuration Status DS3 The following alarm status is provided for the DS3: • LCV • AIS • LOS • LOF (loss of frame) • RDI (remote defect indication) • IDLE code 11 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 The following loopback status is provided for the DS3: • In-band loopback • Remote loopback • Local loopback • FEAC loopback • NIU loopback DS1 The following alarm status is provided for each DS1 and/or T1: • LOS • LCV • AIS The following loopback status is provided for each DS1 and/or T1: • Local loopback • Remote loopback • FEAC (far-end) loopback • In-band loopback C. Maintenance and Diagnostics Maintenance and diagnostics are handled via the RS-232 VT-100 CRAFT port. After login, the following screen menu appears: 1) Active alarms (any active alarms are shown on this screen) 2) DS3 status, provisioning, and performance monitoring 3) DS1 provisioning for all 28 DS1s 4) DS1 status (all 28 DS1 ports) 12 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 D. Provisioning Mechanism Provisioning is performed via the VT-100 CRAFT port. Table 5 shows provisionable features and factory-set default settings from the Configuration Manager Menu. Refer to Section E of this manual and Practice Section 1570 for additional descriptions of loopbacks. Table 5. D3-28D1 Provisioning Feature Option Default DS3 framing format C-Bit parity or M-Frame. M-Frame DS3 FEAC loopback sensitivity Respond to standard FEAC DS3 loopback ON or OFF. OFF DS3 NIU loopback sensitivity Respond to the DS3 NIU loopback code in the FEAC ON or OFF. OFF DS3 Tx response to LOS on the 1. AIS after 2.5 seconds (Note 1). AIS DS3 Rx 2. IDLE after 2.5 seconds (Note 1). 3. Loopback DS3 after 2.5 seconds. DS1 line coding Alternate mark inversion or bipolar with 8-zero substitution. B8ZS Line build-out for DSX-1 Five length ranges covering 0 to 655 feet for DSX-1 interface or 0 to 133 feet 0, 7.5, 15, or 22.5 dB for DS1 interface (Note 2). DS1 FEAC loopback sensitivity Respond to standard FEAC DS1 loopback ON or OFF. OFF DS1 in-band loopback sensitivity DS1 in-band loopback in response from DS3 or DS1 direction, or OFF. DS1 (Note 3) DS1 response to LOS on the 1. No action. Send AIS to DS1 Rx 2. Send AIS to DS3 only. DS3 only DS1 Tx response to LOS on the 1. AIS. AIS DS3 Rx 2. No action. DS1 cross-connection configure Each DS1 can be connected to one of the 28 timeslots in the DS3 1-14 (Note 4) stream; for example, physical DS1/T1 #1 can be transported over DS1 1-28 timeslot #22 in the DS3. System time Set year, month, date, hour, minute, and second. – NOTE 1: In cases 1 and 2, the D3-28D1 will immediately reply with remote defect indication in the X bits. The X bits are not allowed to change more frequently than once per second. NOTE 2: 0, 7.5, 15, or 22.5 dB provisioning to support T1 spans of up to 6000 feet is available for modules with the SJ suffix. NOTE 3: This capability is available in D3-14D1SJ and D3-28D1SJ modules only. NOTE 4: The configuration is for D3-14D1 lower DS1 count modules. 13 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 E. Loopbacks DS3 Interface The D3-28D1 provides the DS3 and DS1 loopbacks controlled from the DS3 far-end alarm and control channel. The sequence follows GR-499-CORE Table 10-16 when C-bit parity framing formats have been set. The unit is provisionable to be sensitive or insensitive to the FEAC DS3 and DS1 loopback codes. Figure 6A illustrates a DS3 FEAC loopback code from the DS3 side, and Figure 6B shows a DS1 FEAC loopback code from the DS3 side. The codes must be received 10 times to be recognized. The D3-28D1 supports two additional network interface unit FEAC codes (NIU loop-up and loop-down) to permit a DS3 loopback of the unit in tandem situations when C-bit parity framing formats have been set. The NIU loop-up code is 00010010 11111111; the NIU loop-down code is 00100100 11111111. As before, the NIU FEACs require the code to be received 10 times for the loop-up/loop-down action to be taken. See Figure 6C. NOTE The D3-28D1 does not automatically know when a tandem situation exists. It is the user’s responsibility to understand and recognize this condition and to provision the unit to operate in a reasonable way. The unit provides a DS3 local loopback activated by VT-100 or TL-1 commands. As shown in Figure 6D, the local DS3 loopback loops the outgoing bit stream of DS3 back toward the DS1 ports. FEAC DS3 Loopback Code DS1 DS3 D3-28D1 Side Side A. DS3 FEAC Loopback Code from the DS3 Side FEAC DS1 Loopback Code DS1 DS3 D3-28D1 Side Side NOTE: The loopback occurs after the DS1 has been demultiplexed from the DS3 bit stream. B. DS1 FEAC Loopback from the DS3 Side Figure 6. DS3 Interface Loopbacks 14 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 DS1 DS3 D3-28D1 O3-3D3 Side Side C. FEAC NIU Loopback Code in Tandem Applications DS3 DS1 D3-28D1 Side Side D. DS3 Local Loopback Figure 6. DS3 Interface Loopbacks (Continued) DS1 Interface D3-14D1SJ and D3-28D1SJ units can respond to in-band NIU loopback activate and deactivate patterns per ANSI standard T1.403, Section 9.4.1. These units can be provisioned to look for the NIU loopback from one direction (DS1) or the other (DS3), and are provisionable to be sensitive or insensitive to the DS1 NIU loopback codes from each direction. NOTES 1. DS1 in-band NIU loopback from the DS3 side (generally from the network to the D3-28D1SJ) causes the associated DS1 to loop toward the DS3, as shown in Figure 7A. 2. NIU loopback detected from the DS1 side (generally sent to a DS1 port from a subscriber) causes the DS1 to be looped back toward the DS1 when this capability is enabled, as shown in Figure 7B. The loopback sensitivity of the DS1 lines is not individually programmable. A single provisioning option selects the appropriate loopback sensitivity for all 28 DS1s as shown in Table 6. As with D3-14D1 and D3-28D1 units, each DS1 in D3-14D1SJ and D3-28D1SJ units can be independently looped toward the DS3 with the appropriate code in the FEAC channel in the C-bit parity DS3 frame format. See Figure 7C. 15 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 Table 6. Loopbacks NIU Loopback Sensitivity Loopback Loopback DS3 DS1 DS1 State Toward DS1 Toward DS3 OFF OFF DROP No No OFF ON DROP Yes No ON OFF DROP No Yes OFF OFF CONTINUE No Yes OFF ON CONTINUE No Yes ON OFF CONTINUE No Yes The service state for each DS1 is either DROP or CONTINUE by virtue of the provisioning of the cross-connect. If a DS1 port is connected to any DS3 timeslot, the DS1 service state is DROP. If a DS1 port is not connected to any DS3 timeslot, the DS1 service state is CONTINUE. See Practice Section 1570 for instructions on provisioning the cross-connect. The DS1 port in the CONTINUE service state will not generate alarm reports, alarm contact closures, an abnormal front-panel indication, or performance monitoring data. A DS1 port that is not connected to a timeslot is considered to be out of service; it will not respond to any loopback codes, and it cannot be placed into loopback manually. A timeslot that is not connected to a DS1 port will be looped back toward the DS3. The D3-28D1 provides DS1-side local loopback for maintenance. This function is activated by VT-100 command. The unit loops the incoming DS1 signal, which is mirrored and placed on the DS1 signal output to the receive data path, as shown in Figure 7D. 16 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 DS1 In-Band NIU Loopback Code DS1 DS3 D3-28D1SJ Side Side A. DS1 In-Band NIU Loopback from the DS3 Side DS1 NIU Loopback Code DS1 DS3 D3-28D1SJ Side Side B. NIU Loopback Detected from the DS1 Side FEAC DS1 Loopback Code DS1 DS3 D3-28D1 Side Side C. DS1 FEAC Loopback from the DS3 Side DS#1 DS#4 DS1 LIU #1 D3-28D1 DS3 Mux/DeMux LIU DS#25 DS1 DS3 Side Side DS#28 DS1 LIU #7 D. DS1-Side Remote Loopback Figure 7. DS1 Interface Loopbacks 17 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 6. SPECIFICATIONS Table 7 lists the electrical and physical characteristics of the unit. Table 7. D3-28D1 Specifications Description Specification A. System Characteristics Loopback Local DS1 and DS3 loopbacks Remote DS1 and DS3 FEAC loopbacks Remote DS1 NIU loopbacks (SJ versions) B. DS3 Interface Line Rate 44.746 Mb/s, ± 20 ppm Line Code B3ZS Line Impedance 75 ohms ± 5%, unbalanced Free-Running Transmit Clock 44.736 MHz ± 20 ppm Receive Sensitivity –10 dB Frame Format M-Frame, C-Bit Parity Pulse Amplitude 0.36V to 0.85V peak Short Line Build-Out a) 834A cable 0 to 225 feet b) Mini-coax Ks-19224 0 to 75 feet c) 735A cable 0 to 125 feet Long Line Build-Out a) 834A cable 225 to 450 feet b) Mini-coax Ks-19224 75 to 150 feet c) 735A cable 125 to 250 feet Alarm Indication Signal 1010 for payload bits, all “0” for C & P bits, framed Remote Alarm X bit = 0 C. DS1 Interface Line Rate 1.544 Mb/s, ± 32 ppm Line Code AMI or B8ZS selectable Line Impedance 100 ohms ± 5%, balanced Line Rate Tolerance 1.544 Mb/s, ± 130 ppm Frame Format SF, ESF, or unframed Pulse Amplitude 3V ± 10% Pulse Width 324 ns ± 30 ns Line Build-Out 0 to 655 feet, 0 to 22.5 dB (SJ versions) Alarm Indication Signal All ones, no framing 18 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 Table 7. D3-28D1 Specifications (Continued) Description Specification D. Front-Panel Connectors DS1 (1-14 and 15-28) 64-pin AMP CHAMP DS3 (IN and OUT) 75-ohm coaxial CRAFT Network Management Port RS-232, DB-9, female E. Power Requirement Power Supply –48V nominal Input Voltage –42.5V to –56.5V Current a) D3-28D1 and D3-28D1SJ 300 mA b) D3-14D1 and D3-14D1SJ 200 mA Power Consumption a) D3-28D1 and D3-28D1SJ 14 Watts b) D3-14D1 and D3-14D1SJ 10 Watts F. Environmental Temperature Range, Operating –40° to 65°C Relative Humidity, Operating 0 to 95%, no condensation G. Physical Shelf Mechanics a) D3-28D1 and D3-28D1SJ Type 600 b) D3-14D1 and D3-14D1SJ Type 400 Size (height x width x depth, excluding edge connector) a) D3-28D1 and D3-28D1SJ 5.6 x 2.3 x 5.1 inches b) D3-14D1 and D3-14D1SJ 5.6 x 1.5 x 5.1 inches Weight a) D3-28D1 and D3-28D1SJ 16 ounces b) D3-14D1 and D3-14D1SJ 12 ounces 19 D3-28D1 and D3-14D1 1559, Issue 1, March 2004 7. CUSTOMER SERVICE Direct questions concerning the operation of the unit to Pulsecom Technical Support. If the unit is defective, limit field repair to replacement of the plug-in module only. Obtain repair services by returning the defective unit to the Pulsecom Repair Department. Pulse Communications Inc. Customer Service For technical support: A Subsidiary of HUBBELL INCORPORATED International — 703-478-7077 2900 Towerview Road North America — 1-800-841-1005 Herndon, Virginia 20171–3286 E-mail — field.service@pulse.com For order information: 1-800-381-1997 PRINTED IN USA For product literature: 1-800-699-6006 20