Nortel Networks Passport ARN Routers - Manual (Page 137)

ARN Technical Specifications
114200-E Rev 00 C-13
56/64K DSU/CSU Interface
The ARN supports direct synchronous access to either a 56K dataphone digital
service (DDS) or 64K Clear Channel dedicated services using an optional 56/64K
DSU/CSU adapter module. The 56/64K DSU/CSU interface uses an 8-pin RJ-45
connector as shown in
Table C-10 .
Table C-10 lists the 56/64K DSU/CSU interface pin assignments.
FT1/T1 DSU/CSU Connections
The ARN supports the conversion of data (HDLC protocol) from a T1 line using
an optional FT1/T1 DSU/CSU adapter module. The integrated DSU/CSU
functionality allows you to connect directly to the T1 network, as opposed to
connecting via an external adapter. This solution reduces equipment costs and
simplifies connection to a T1 carrier.
The ARN FT1/T1 DSU/CSU implementation supports dynamic reconfiguration,
Fractional T1 loopback, Facility Data Link (FDL) functions, and an integrated Bit
Error Rate Test (BERT) line tester. Configuring WAN Line Services describes
these services and how to configure them for connection to a T1 network.
Table C-10. 56/64K DSU/CSU Interface Pin Assignments
Pin Assignment Pin No. Signal
1 TD (Ring)
2 TD (Tip)
3 Not used
4 Not used
5 Not used
6 Not used
7 RD (Tip)
8 RD (Ring)
1 2 3 4 5 6 7 8