7705 SAR-A Ports
130 7705 SAR-A Chassis Installation Guide
T1/E1 Ports
On the 7705 SAR-A variant equipped with T1/E1 ports, there are eight RJ-45 connectors on
the front of the chassis that provide 100 Ω T1 or 120 Ω E1 access to the T1/E1 ports. The
T1/E1 ports can be used only for access connectivity.
Use shielded RJ-45 cables to attach customer equipment to the 7705 SAR-A T1/E1 ports.
Shielded cable must be used to maintain EMC compliance. The T1/E1 ports are on-premises
ports and require an external CSU to connect off premises. An adapter cable (3HE04990AA)
is available to convert an RJ-45 connector to BNC for E1 ports; these ports must be
configured for 75 Ω impedance.
Figure 33 shows the pin numbering for the top row (odd-numbered) T1/E1 ports. Figure 34
shows the pin numbering for the bottom row (even-numbered) T1/E1 ports.
Figure 33: Top Row T1/E1 Port RJ-45 Connector Pin Numbers
Figure 34: Bottom Row T1/E1 Port RJ-45 Connector Pin Numbers
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