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17 ThinMux Chassis December 7, 2001 LTPH-UM-1088-02, Issue 2 December 7, 2001 ThinMux Chassis LTPH-UM-1088-02, Issue 2 List of Tables LIST OF TABLES 1. T1/E1 Receive Pin Assignments......................................................... 14 2. T1/E1 Transmit Pin Assignments ....................................................... 16 3. RS-232 Craft Interface Pin Assignments ............................................ 17 4. Ethernet 10/100BASE-T Pin Assignments ......................................... 17 ThinMUX Chassis November 7, 2001 List of Tables LTPH-UM-1088-02, Issue 2 November 7, 2001 ThinMUX Chassis LTPH-UM-1088-02, Issue 2 Overview OVERVIEW The ADC® ThinMux™ chassis houses the ThinMux DS3 or ThinMux STS-1 multiplexer and fits in a Central Office (CO) rack. Each type of multiplexer provides support for a minimum of 28 T1 (or 21 E1) lines from the chassis. The chassis also provides two DS3 interfaces for external equipment. It features a forced-air cooling unit, Ethernet port, rear craft port, craft ports on the multiplexer front panels, and fiber management guides. Offering a 1+1 protected multiplexing function on the network and client side, the ThinMux chassis is the industry’s most compact multiplexer platform. FEATURES • The ThinMux chassis allows for the following shelf configurations: – STS-1 to 28 T1 (using ThinMux multiplexer HXU-359) – DS3 to 28 T1 or 21 E1 lines (using ThinMux multiplexer HXU-360) • Dual multiplexer support for 1+1 protection of network and customer interfaces • Migration path and investment protection on installed equipment • Concentration of many low-speed access network interfaces to a single high-speed network interface • Industry-standard 64-pin T1 (or E1) connectors enable rapid installation • Craft port access for easy configuration • Field-serviceable forced-air cooling unit Depending on your network interface requirements, several cabling options are available. Select the instructions that apply to your configuration as shown in “Installing DS3 or STS-1 Interface Cables” on page 11. ThinMux Chassis January 3, 2002 Overview LTPH-UM-1088-02, Issue 2 BACKPLANE RJ-45 Ethernet DS3 or STS-1 DB-9 cr DB-9 crDB-9 craft por aft poraft port tt 10/100BASE-T connectors connector connectorconnector -48 Vdc battery supply connector Line 2 Line 1 screw connectors (common access panel) Tx RxTx Rx ESD strap input Alarm FE MIN MAJ CRIT COM -48 A RTN B] -48 B RTN A FGND Craft RS-232 Bits BB+ A- Test Access TTIP TRING RTI P CRIT VIS NO COM NC CRIT AU D NO COM NC A+ RRING Fra me GND Frame GND 32-pair (female) connectors -T1, E1 (left Rx, right Tx) BITS A and B, test access Chassis ground (visual, audible, and discrete alarm wire-wrap pins) Figure 1. Backplane Interfaces (rear view) The ThinMux chassis provides a compact 1U platform for the ThinMux family of multiplexers with the following interconnects: • One 10/100BASE-T Ethernet (IEEE 802.3) • Two 64-pin female receptacle connectors for T1/E1 transmit/receive, chassis-shielded • Four 75. BNC connectors for DS3/STS-1 transmit/receive • Four wire-wrap 0.045-inch pins for Building Integrated Timing Supply (BITS) A and B • Four wire-wrap 0.045-inch pins for T1 or E1 test access, transmit/receive • Four wire-wrap 0.045-inch pins for Visible (VIS) and Audible (AUD) alarms (dry relay contacts) which are normally open (NO) discrete alarms • Five wire-wrap 0.045-inch pins for discrete alarms (solid sate relay contacts): Far End, Minor, Major, and Critical • Five screw connectors for -48V dual power • One DB-9 connector for RS-232 communication January 3, 2002 ThinMux Chassis LTPH-UM-1088-02, Issue 2 External Interfaces EXTERNAL INTERFACES The ThinMux chassis provides the following interfaces: • T1/E1 • T1/E1 Test • RS-232 • 10/100BASE-T Ethernet • Discrete alarms T1/E1 INTERFACE There are two female 32-pair connectors to access 28 T1 (or 21 E1) lines for intra-building connection; no protection is provided on the backplane. One connector is for transmission, the other is for reception. Each port is routed to both multiplexers (A and B) for transmit and receive. See “Appendix A -Pin Assignments” on page 14 for interface pinout description. A shielded 32-pair cable should be used and grounded at either the frame or chassis. The ground connection is done at one end of the cable only to avoid ground loops. T1/E1 TEST INTERFACE The four-wire test interface can be routed to any of the 28 T1 (or 21 E1) low-speed T1/E1 ports. It can be used to monitor the line or to look toward the network or subscriber drop. The four signals are accessed through four 0.045-inch wire-wrap pins. (For more information about the wire-wrap pins, see “Connect Test Access” on page 9.) ThinMux Chassis January 3, 2002 External Interfaces LTPH-UM-1088-02, Issue 2 RS-232 CRAFT INTERFACE Communication with the ThinMux STS-1 and ThinMux DS3 central processors occur through a standard grounded DB-9 connector (RS-232 Data Communication Equipment interface). Signals are routed to...