DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1079MODEM-PT (Modem Pool Port)
9
MODEM-PT (Modem Pool Port)
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 9-62
. 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 baud
conversion resources. Each conversion resource contains two interfaces to the
PBX digital network: an analog port and a digital port. The analog port is
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1.
UU
is the universal cabinet number (1 for PPN, 2 - 44 for EPNs).
C
is the carrier designation
(A, B, C, D, or E).
SS
is the number of the slot in which the circuit pack resides (01 to 21).
pp
is the two digit port number (01, 02, ...).
Full Name of MO
MODEM-PT MINOR test port UUCSSpp s Modem Pool Port
