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Communication Manager Maintenance-Object Repair Procedures
1678 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
MODEM-PT (Modem Pool Port)
S8700 | 8710 / S8500
The Modem Pool Port provides an interface for digital and analog data communication devices
or ports connected to the PBX. It may be thought of as a PBX data communications “conversion
resource” because it converts analog modem signals typically used in the telephone network
into digital signals that are compatible with the internal PBX network and vice versa.
There may be a number of these conversion resources available in the PBX, each assigned to
an available Modem Pool Group. Only one conversion resource is used per data connection.
The PBX software usually adds the conversion resource into a data connection if it determines
that it is necessary for the call. Typical connections that include Modem Pool conversion
resources include data calls from Analog Line or Central Office Trunk ports to any digital port or
Digital Line or Trunk ports to any analog port. An example of a Data Module to Central Office
Trunk connection using a Modem Pool conversion resource is shown in Figure 93: Typical
Modem Pool Switched Connection with Integrated Pooled Modem on page 1679. In the case
where a local data call originates from an analog port normally used for voice service only and
terminates on a digital port, a Data Origination access code must be dialed before the extension
number for the Modem Pool conversion resource to be included in the connection.
Each Modem Pool conversion resource contains two ports. One of these, an analog port, is
connected (via the PBX network) to the analog line or trunk port that is the source of the modem
signal. The second port is referred to as the digital port and is connected (again through the
PBX network) to the digital line or trunk port associated with the Data Module in the connection.
The analog modem signals enter the analog port of the conversion resource in standard Pulse
Code Modulation (PCM) format, but are converted into Data Communications Protocol (DCP)
format before going to the digital line or trunk in the connection.
Integrated Modem Pools
There are two primary types of Modem Pool conversion resources available: an Integrated
Pooled Modem and a Combined Modem Pool. The integrated TN758 Pooled Modem circuit
pack contains two independent 300- or 1200-bps conversion resources. Each conversion
resource contains two interfaces to the PBX digital network: an analog port and a digital port.
The analog port is connected through the PBX network to the analog line or trunk port
containing the analog modem signals. The digital port connects through the PBX network to the
digital line or trunk port in the call. Figure 93: Typical Modem Pool Switched Connection with
Integrated Pooled Modem on page 1679 shows a typical end-to-end connection using a
conversion resource on the integrated Pooled Modem circuit pack.
MO Name Alarm
Level
Initial SAT Command to Run Full Name of MO
MODEM-PT MIN test port location s Modem Pool Port