Nortel Secure Router 4134 Installation Manual page 22

22 Nortel Secure Router 2330/4134 hardware components fundamentals
ATTENTION
Slot 2 of the Secure Router 4134 supports only one port of any WAN data Small
Module. If you install a 2-port Small Module in Slot 2, and use the Small Module
for data connections, one port only is functional (port 1).
This limitation also applies to the 2-port T1/E1 and ISDN BRI Small Modules if
they are configured for voice traffic: only port 2/1 is functional. This limitation
does not apply to FXS or FXO voice modules.
This limitation does not apply to the Secure Router 2330.
The following figures show the two types of T1/E1 Small Modules.
Figure 4
1-port T1/E1 Small Module
Figure 5
2-port T1/E1 Small Module
In data mode, the 1-port T1/E1 Small Module provides either one T1 port
(supports 24 timeslots with a line data rate of 1.544 Mbps) or one E1 port
(supports 31 timeslots with a line data rate of 2.048 Mbps).
In voice mode, the T1/E1 Small Module supports Channel Associated
Signaling (CAS) to provide the Secure Router 2330/4134 with connections
to the Public Switched Telephone Network (PSTN).
You can also configure the 1- and 2-port T1/E1 Small Modules to operate
as Integrated Services Digital Network (ISDN) primary rate interface (PRI)
connections, providing 23 (T1) or 30 (E1) bearer channels (B-channel) for
data and 1 D-channel for signaling.
The 2-port T1/E1 Small Module provides either two T1 ports or two E1
ports.
Nortel Secure Router 2330/4134
Installation — Hardware Components
NN47263-301 03.01 7 September 2009
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