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

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