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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Managing data calls
416Modem Pooling
15
For Combined modem poolings:
1. On the Modem Pool Group screen, administer all fields. Refer to ‘‘
Modem
Pool Group’’ on page 817 for more information.
2. On the Feature Access Code screen, administer the Data Origination
Access Code field. Refer to ‘‘
Feature Access Code’’ on page 619 for more
information.
Considerations
■ On data calls between a data module and an analog-data endpoint,
Return-to-Voice releases the modem and returns it to the pool. The
telephone user connects to the analog-data endpoint.
■ For traffic purposes, the system accumulates data on modem-pooling calls
separate from voice calls. Measurements on the pools also accumulate.
■ Modem Pooling is not restricted. Queuing for modems is not provided,
although calls queued on a hunt group retain reserved modems.
■ Avoid mixing modems from different vendors within a combined pool
because such modems may differ in transmission characteristics.
■ Each data call that uses Modem Pooling uses four time slots (not just two).
As a result, heavy usage of Modem Pooling could affect TDM
bus-blocking characteristics.
■ Tandem switches do not insert a pooled modem. The originating and
terminating switches insert a pooled modem.
Interactions
■ Call Detail Recording
Data call CDR records the use of modem pools on trunk calls.
■ Data Call Setup
Data calls to or from a TDM cannot use Modem Pooling.
■ Data Privacy and Data Restriction
The insertion of a modem pool does not turn off Data Privacy or Data
Restriction.
■ Data-Only Off-Premises Extensions
Calls to or from a Data-Only Off-Premises Extension cannot use Modem
Pooling, when this type of digital-data endpoint uses a TDM.