Cisco EF4116 User Manual

Preparing for Installation 2-31
Network Connection Considerations
Figure 2-32 Channelized T1 Network Interface Processor
Following are the T1 specifications:
• Transmission bit rate: 1.544 megabits per second (Mbps) ± 50 parts per million (ppm)
• Output pulse amplitude: 3.0 volts (V) ± 0.6V measured at DSX
• Output pulse width: 324 nanoseconds (ns) ± 54 ns
• Complies with all AT&T Accunet TR 62411 specifications
T1 Cabling
For the CT1, two standard T1 serial cables are available from Cisco Systems: null-modem and
straight-through. A straight through cable connects your router to an external CSU. Null modem
cables are used for back-to-back operation and testing.
The cables have male 15-pin DB connectors at each end to connect the CT1with the external CSU.
The T1 interface cable has two 15-pin DB connectors at each end to connect the CT1with the
external T1 CSU. Figure 2-33 shows the T1 interface cable, connectors and pin-outs.
Figure 2-33 T1 Interface Cable
H3155
cT1/ PRI
LOOPBACK LOCAL ALARM REMOTE ALARM
DB-15
female
in 1
in 9
in 11
in 3
Pin 1
Pin 9
Pin 11
Pin 3
72-XXXX-01 MIP
T1 or null-modem
connector (typical)
H2385

Cisco EF4116 Specifications

General

Brand	Cisco
Model	EF4116
Category	Network Router
Language	English