Cisco Systems 7100 Series quick start Connect the T1 Ports Cisco 7120-4T1 only

Connect the Router to the Network (continued)

5

Strain-relief screws

EN

TD

TC

RD

RC

LB

CD

I

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

22070

Serial 1/0

To CSU, DSU, or external

synchronous serial equipment

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:

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.

7

•EIA/TIA-232

•V.35

•EIA/TIA-449

•X.21

•EIA-530