AT&T 585-300-903 manual ALL Connections to Analog Ports Modem Switch

Switched EIA RS-232 Networks 3-5

_______________________________________________________________________________________

_

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

ALL CONNECTIONS TO ANALOG PORTS

T/R MODEM

SWITCH

H600-330

GROUP 1

T/R

MODEM

H600-331

GROUP 2

AUDIX

RS-232

H600-331

GROUP 2

AUDIX

RS-232

T/R

PUBLIC/PRIVATE INTERLOCATION

FACILITIES

SWITCH

T/R

T/R

	H600-331
	GROUP 2
NOT
USED	AUDIX

SWITCHED LINES

MODEM

TO THE CENTRAL OFFICE

RS-232

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.