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Server Alarms - Avaya Support

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MODEM-PT (Modem Pool Port)<br />

Figure 81: Typical Modem Pool Switched Connection with Integrated Pooled Modem<br />

TERMINAL<br />

TELEPHONE<br />

NETWORK<br />

MODEM<br />

HOST<br />

COMPUTER<br />

DATA MODULE<br />

ANALOG<br />

Combined Modem Pools<br />

DCP<br />

TIP/RING<br />

ANALOG<br />

POOLED MODEM<br />

CONVERSION<br />

RESOURCE<br />

DIGITAL<br />

LINE<br />

(TN754)<br />

(TN758)<br />

CENTRAL OFFICE<br />

TRUNK<br />

(TN747B)<br />

The Combined Modem Pool conversion resource is the second type available. The function<br />

served by the Combined Modem Pool is similar to that of the integrated Pooled Modem circuit<br />

pack, but the physical implementation is much different. It has the advantage of supporting any<br />

speed the external modem can support. The integrated Pooled Modem circuit pack can only<br />

support 300- or 1200-bps transmission rates. The Combined Modem Pool conversion resource<br />

consists of a port on an Analog Line circuit pack, an external modem, a Data Module, and a port<br />

on a TN754 Digital Line circuit pack. The tip and ring interface of the Analog Line is connected<br />

to the modem, the RS-232C interface of the modem connects to the Data Module, and the DCP<br />

interface on the Data Module is connected to the Digital Line port.<br />

The analog modem signals pass through the Analog Line port to the modem. The modem<br />

converts these to RS-232C signals which are passed on to the Data Module. The Data Module<br />

further converts the signals to the DCP protocol for the Digital Line port which passes the<br />

signals on to the PBX network.<br />

DIGITAL<br />

PORT<br />

ANALOG<br />

PORT<br />

Communication Manager Release 5.0 Issue 4 January 2008 1035<br />

DCP<br />

DCP<br />

PCM<br />

PCM<br />

PBX<br />

DIGITAL<br />

NETWORK

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