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Figure 3-3 – AT&T AUDIX Networking 585-300-903 User Manual

Page 43

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Switched EIA RS-232 Networks

3-5

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NOTE

Equivalent modems such as the AT&T Paradyne DL424 instead of the DM424 modem could
be used.

The modem requires a connection through one of the switch’s analog ports or can connect directly to a CO
line. Switch analog port circuit packs are:

System 75, Generic 1, and Generic 3: TN742 or TN746B analog line circuit

System 85 and Generic 2 traditional module: SN222, SN228, or SN228B analog line circuit

System 85 and Generic 2 universal module: TN742 or TN746B analog line circuit

RS-232

AUDIX

NOT
USED

SWITCHED LINES
TO THE CENTRAL OFFICE

H600-330
GROUP 1

H600-331
GROUP 2

H600-331
GROUP 2

H600-331
GROUP 2

PUBLIC/PRIVATE
INTERLOCATION

FACILITIES

ALL CONNECTIONS
TO ANALOG PORTS

MODEM

T/R

T/R

T/R

T/R

T/R

SWITCH

SWITCH

RS-232

AUDIX

MODEM

RS-232

AUDIX

MODEM

Figure 3-3. Switched RS-232 Network for Separate Locations

If the modems must be located greater than 5.0 feet (1.524 meters) from the AUDIX system, an M25A RS-
232 extender cable is required for each. The modem must be within 50 feet (15.24 meters) of the AUDIX
system. The tip/ring circuit should be engineered by a switch representative.