Managing Data Calls
Modem Pooling
Administrator’s Guide for Avaya Communication Manager
437
November 2003
Modem Pooling
Modem Pooling allows switched connections between digital-data endpoints (data modules) and
analog-data endpoints via pods of acoustic-coupled modems. The analog-data endpoint is either a trunk
or a line circuit.
Data transmission between a digital data endpoint and an analog endpoint requires conversion via a
modem, because the DCP format used by the data module is not compatible with the modulated signals of
an analog modem. A modem translates DCP format into modulated signals and vice versa.
Modem Pooling feature provides pools of integrated-conversion modems and combined-conversion
modems.
Integrated-conversion modem pools have functionality integrated on the Pooled Modem circuit pack,
providing two modems. Each one emulates a TDM cabled to a 212 modem. Integrated are modem pools
not available in countries that use A-law companding.
Combined-conversion modem pools are TDMs cabled to any TDM-compatible modem.
Combined-conversion modem pools can be used with all systems.
The system can detect the needs for a modem. Data calls from an analog-data endpoint require that the
user indicate the need for a modem, because the system considers such calls to be voice calls. Users
indicate this need by dialing the data-origination access code field on the Feature Access Code screen
before dialing the digital-data endpoint.
The system provides a Hold Time parameter to specify the maximum time any modem can be held but
not used (while a data call is in queue).
Administering Modem Pooling
For Integrated modem poolings:
1
On the Modem Pool Group screen, administer all fields. See
Modem Pool Group
on page 1070
for more information.
2
On the Feature Access Code screen, administer the
Data Origination Access Code
field. See
Feature Access Code
on page 801 for more information.
3
On the
Data Module
screen, administer all fields. See
Data modules
on page 732 for more
information.
For Combined modem poolings:
1
On the
Modem Pool Group
screen, administer all fields. See
Modem Pool Group
on page 1070
for more information.
2
On the
Feature Access Code
screen, administer the
Data Origination Access Code
field. See
Feature Access Code
on page 801 for more information.