Filter
Top Products
3-8 Switched EIA RS-232 Networks
________________________________________________________________________________________________
________________________________________________________________________________________________
________________________________________________________________________________________________
AUDIX System Requirements for Switched RS-232 Using Data
Modules For DCP
Each AUDIX system must be running R1V5 or later software and must be equipped with a TN539 or
TN539B ACCE circuit pack and the AUDIX Networking Breakout cable (H600-331 Group 1 or 2).
Switch (or Customer) Requirements for Switched RS-232 Using Data
Modules for DCP
Each AUDIX RS-232 channel to be converted to DCP requires a data module. The data module must be
connected to a DCP port at the switch and should be located within 5 feet (1.524 meters) of the AUDIX
system, so an M25A RS-232 extender cable is not needed. The distance from the data module to the switch
should be no more than 5000 feet (1524 meters). The following is required:
• One of the following data modules:
— For DCP mode 1 (56 Kbps, synchronous) or DCP mode 3 (64 Kbps, synchronous) use an
MPDM/M1*. The MPDM/M1* operates in synchronous mode. An older MPDM can be upgraded
to support 56 Kbps with D-kit D-181509. Install the D-kit by following the instructions included
with the kit. These channels can only be used for incoming calls.
— For DCP mode 2, use a 7400A or 7400B DSU. The 7400A and 7400B operate in only
asynchronous mode. These channels can be used for incoming or outgoing calls.
• One D8W-87 modular cord (provided with the data module) is required for each module.
• Switch DCP interface:
— System 75, Generic 1, and Generic 3: TN754 Digital Line Circuit
— System 85 and Generic 2 traditional module: SN270B General Purpose Port
— System 85 and Generic 2 universal module: TN754
If the converted channels are to be used for DCP Mode 2 operation, two modem pool pairs are also
required. See Chapter 5, DCP Mode 2 Networks — Modem Pooling. Access to two additional channels on
the interlocation facilities might also be required.
Data Rates for Switched RS-232 Using Data Modules For DCP
Data rates are limited to the capabilities of the data modules. MPDM/M1* data modules operate at 56 or
64 Kbps (synchronous), but they do not support dialing out at these speeds, so the converted channels
would be limited to receiving calls only. In some cases this limitation would not create a problem. In cases
where it would, the 7400A data module, which supports incoming and outgoing calls, can be used.
However, with the 7400A, communication is performed at low speeds (up to and including 19.2 Kbps,
asynchronous).