NEC N 1093100 12xx-Slots, 121x-Lines, Description, Options, 1213-T1/E1Card Setup, Features, •1-30

12xx-Slots

121x-Lines

1213-T1/E1 Card Setup

1213-T1/E1 Card Setup

Description

Use this program to set up the parameters of the T1/E1 PCBs.

Options

1213-01: Number of PCM Channels

(# PCM Channels)

Use this option to determine the number of active channels on the PCB. PCBs configured for T1 have 24 avail- able channels, while E1 has 30. Enter the number of channels to be active, or enter 0 to activate all channels.

If you are using all channels in the T1, leave this entry at 0. If you are connected to a fractional telco T1 cir- cuit (e.g., providing only 8 circuits), set this option to match the number of circuits in your fractional span. Additionally, you may have to limit the number of active channels if the system has a unique configuration that could exceed the 119 allowable timeslots.

This option always selects the lowest channels. For example, an entry of 8 uses channels 1-8. When connecting to a DSU and splitting voice and data channels, the voice channels must be the lower-numbered channels.

Features

• T1 Lines (page 338)

IntraMail Features

• None

Options

•1-30

•0 for all channels

Default

•0

1213-02: Clock Control

(Clock Control)

Use this option to specify the clock source for the T1 PCB. The clock is required to synchronize the PCB’s operations. The PCB can be either the clock master (1) or the clock slave (2). As master, the T1 PCB uses its own internal clock as the clock source. As slave, the T1 PCB uses the connected T1 circuit from the telco as the clock source.

When setting up Tie Lines, keep track of your clock sources. For example, if the local system is the clock master, the remote system should be set for slave so it uses the connected circuit as the clock source.

Features

• T1 Lines (page 338)

IntraMail Features

• None

Options

•1 for master

•2 for slave

Default

•1

616 ◆ System Options: 1001-1702 DSX Software Manual