
Configuring MCE1 and MCT1 Services
117021-A Rev. A 7-31
When enabled, the NRZI Enable parameter specifies nonreturn to zero inverted
(NRZI) line encoding to communicate state changes between the subscriber’s
devices across the Frame Relay network. You can disable communication of such
state changes by setting this parameter to Disable.
The NRZI Type parameter specifies the NRZI encoding format in the frame on the
logical line. Ignore NRZI Type if you set NRZI Enable to Disable.
Valid options are
• Mark -- This format uses a 0-bit to indicate a state change and a 1-bit to
indicate no state change.
• Space -- This format uses 1-bit to indicate a state change and a 0-bit to
indicate no state change.
Assigning Timeslots
After configuring logical lines, you configure channels (DS0s) of bandwidth by
grouping 1 to 23 (MCT1) or 1-31 (MCE1) contiguous or noncontiguous DS0 time
slots per DS1 frame.
To assign timeslots:
1. Start at the MCE1 or MCT1 Logical Lines window.
2. Click on Timeslots.
The MCE1 Timeslots or the MCT1 Timeslots window appears (F
igure 7-10).
Site Manager: NRZI Enable parameter: page A-40
Site Manager: NRZI Type parameter: page A-40
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