Lucent Technologies PortMaster - Manual (Page 181)

Configuring the PortMaster 3 11-13
Using the T1 Expansion Card
When you specify internal, the built-in 1.544MHz crystal sets timing on the line. This
is useful for dry wire configurations, or for back-to-back connections. When you specify
external, the built-in DSU/CSU extracts timing from the line.
Configuring the T1 Expansion Card for Fractional T1
The T1 card is identified as line2 in the PortMaster 3. Follow these steps to configure the
PortMaster 3 to use fractional T1 service:
1. Set the line for fractional T1.
Command> set line2 fractional
2. Set the channel group for fractional T1.
Command> set line2 group Cgroup channel Channel-list
3. Set the channel rate.
Command> set line2 group Cgroup 56k|64k
Note – 56Kbps is typically used for D4 framing while 64Kbps, the default, is used for
other framing types.
4. Save the configuration and reboot the PortMaster.
Command> save all
Command> reboot
Note – If you reboot the PortMaster before setting the group and the channel for
fractional T1, you lose the line.
Configuring the PortMaster 3 for Full T1
To configure the card for full T1, enter the following commands:
Command> set line2 t1
Command> save all
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