Supported Subscriber Services; Channel Configuration - Nortel DMS-100 Series Maintenance Manual

• digital data unit (DDU). The system supports PDN, HOLD and RELEASE
keys. There is no modem pooling.
• lines with cutoff on disconnect option. The cutoff relay is operated for 300
ms.

Supported subscriber services

During OPM ESA mode, the supported subscriber services are POTS and
MDC.
POTS subscriber services
The POTS services provided include the following:
• one home numbering plan area (HNPA) code for each OPM
• services for single party, multi-party, coin and PBX lines
• three to seven digits local dialing plan
• up to 16 prefix or special numbers per OPM with a maximum of 15 digits
each for special termination. For example, 0-, 0+, 411 and 911.
• invalid or vacant terminations that the system routes to reorder or
announcement termination
MDC customer group services
The MDC services provided include the following:
• maximum 640 members in a customer group
• maximum 32 customer groups per OPM
• up to eight prefix or special numbers per OPM with a maximum of 15
digits each for each customer group (for example, 0+, 411, 9+ with or
without second dial tone, prefix fence and ambiguous numbers)
• station-to-station dialing for one-digit through six-digit extension numbers
• denied incoming call for a station
• direct outward dialing with or without second dial tone for termination to
another customer group or POTS lines within the same OPM
• inter-customer group calling by the same dialing plan (except lines with
the denied incoming option)
• treatment of primary numbers of the multiple appearance directory number
(MADN) groups as normal MDC lines
• multiple centrex customer dialing plans

Channel configuration

On ESA entry, the system arranges the C-side channel map of the OPM to
provide more interswitch channels for ESA call processing.
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
ESA maintenance overview 4-19