Cisco 7100 Series - Manual (Page 9)

7
Connect the Router to the Network
(continued)
To CSU, DSU, or external
synchronous serial equipment
TD TC RD RC LB CD
TD TC RD RC LB CD
TD EN TC RD RC LB CD
5
I
TC RD RC LB CD TD
22070
Strain-relief screws
Serial 1/0
Connect the T1 Ports
(Cisco 7120-4T1 only)
The four T1 ports operate at T1
(1.544-Mbps) and E1 (2.048-Mbps) speeds
Each port uses an identical 60-pin D-shell
receptacle that supports the following
interface types:
• EIA/TIA-232
• V.35
• EIA/TIA-449
• X.21
• EIA-530
1 Attach the appropriate serial cable
directly to the receptacle on the router
and tighten the strain-relief screws.
2 Attach the network end of the serial
cable to a DSU, CSU, DTE, or other
external synchronous serial equipment
and tighten the strain-relief screws.