3Com MSR 30, MSR 20, MSR 50 manual Interface attributes of SIC-1TPRI/SIC-1T1-F

SIC-1TPRI/SIC-1T1-F 33

Figure 24 Extending an E1 120-ohm balanced twisted pair cable

DB-15

Router

	RJ-45	RJ-45Network
			devices such
			as DDN
Network interface connector

120-ohm balanced twisted pair 120-ohm E1 trunk cable

Step 4: Check the status of LINK LED on the SIC-1EPRI/SIC-1E1-F panel: ON means the link is connected and OFF means the link is not connected. In the latter case, check the line.

SIC-1TPRI/SIC-1T1-F

Introduction 1-port channelized T1/CT1/PRI compatible interface card (SIC-1TPRI) supports:

■Transmission/Receiving and handling of T1 data streams;

■CT1 (channel T1) access;

■ISDN PRI function;

■Remote loopback and local loopback, facilitating the effective and flexible debugging.

It is possible to use the card for multiple purposes through different configurations.

Following are the differences between SIC-1TPRI and 1-port Fractional T1 interface card (SIC-1T1-F):

■FT1 mode of SIC-1T1-F can support only one channel bundle (the rate is n ⋅ 56 kbps, n=1-24), while the 24 channels can be grouped into multiple arbitrary bundles by SIC-1TPRI.

■SIC-1T1-F does not support PRI mode.

Interface Attributes The interface attributes of SIC-1TPRI/SIC-1T1-F are given in the following table:

Table 8 Interface attributes of SIC-1TPRI/SIC-1T1-F

Attribute	Description
Connector type	RJ-45
Number of connectors	1