Instruction manual
Modem Pooling
Conversion resources are requlred for:
● Data Terminal Dialing: To establish a data connection for calls originated via
Terminal Dialing to intrapremises analog data endpoints.
● Incoming Trunk Calls: To establish a data connection between an incoming trunk call
and a digital endpoint. Incoming trunk calls that are answered at a voice terminal can
be transferred to a data endpoint using the Transfer To Data feature.
● On-Premises Data Calls: To establish a data connection between an on-premises
analog data endpoint and an on-premises digital endpoint.
● Outgoing Trunk Calls: To establish a data connection between an off-premises
analog endpoint (modem) and an on-premises digital endpoint.
Considerations
Modem Pooling provides a pool of conversion resources that increases data call flexibility.
Conversion resources allow analog data endpoints, using modems, to communicate with
digital data endpoints (using data modules). Also, modem pooling reduces costs by sharing
resources.
Interactions
The following features interact with Modem Pooling.
Automatic Route Selection: Data calls may be queued. See Table 2-I, “PLEASE WAIT”
message.
Calling Restrictions:
If a terminal is toll or access restricted, the modem resource is
released when the user receives intercept treatment.
Direct Group Calling:
Modem pooling supports calls to data endpoints that are part of a
DGC group. While an incoming data call is in the DGC group queue, the caller hears
Ringback Tone.
The conversion resource is inserted if the call is completed to a digital
endpoint.
Station Hunting:
Modem Pooling supports calls to data endpoints that are part of a station
hunting group.
Station Message Detail Recording (SMDR): SMDR records do not reflect modem resource
usage. Interpremises data calls using a conversion resource are reported as data calls on
the SMDR call record.
2-231