AT&T 7200 series, 7500 series, 7100 series, 2500 series, 7400 series, 7300 series manual Modem

DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-11

_______________________________________________________________________________________

_

DCIU

OR

TN760

(TIE TRUNK)

TN722

OR TN767

(DS1)

GENERIC 2

WITH

UNIVERSAL

MODULE

DCIU

SN232

(TIE TRUNK)

ANN11

(DS1)

SYSTEM 85/G2

WITH

TRADITIONAL

MODULE

SIGNALING CHANNEL

RS449		RS232C	RS449
	RS232C	MODEM
		MODEM
	RS449 TO RS232C CONVERSION
	ANALOG OR DS1 VOICE CHANNEL

DCIU

SN233

(TIE TRUNK)

ANN11

(DS1)

SYSTEM 85/G2

WITH

TRADITIONAL

MODULE

DCIU

OR

TN760

(TIE TRUNK)

TN722

OR TN767

(DS1)

GENERIC 2

WITH

UNIVERSAL

MODULE

Figure 6-12.Long Haul Analog Signaling: System 85/G2 to System 85/G2 Via Modem

		SIGNALING CHANNEL	RS232C TO
DCIU		DCIU	RS449 CONVERSION	DCIU	DCIU
		RS449	MPDM	RS449
		MPDM
TN754		SN270B		SN270B	TN754
				(DIGITAL
(DIGITAL
		(DIGITAL			(DIGITAL
				LINE)
LINE)
		LINE)			LINE)
	OR			OR
			ISDN PRI
TN767		ANN35		ANN35	TN767
(PRI)
		(PRI)		(PRI)	(PRI)
GENERIC 2		SYSTEM 85 (R2V4)/G2		SYSTEM 85 (R2V4)/G2	GENERIC 2
WITH		WITH		WITH	WITH
UNIVERSAL		TRADITIONAL		TRADITIONAL	UNIVERSAL
MODULE		MODULE		MODULE	MODULE
*ONE OF THE 23 B-CHANNELS IS USED FOR DCS SIGNALING: THE REMAINING 22 CHANNELS CAN BE USED FOR VOICE.

Figure 6-13.Long Haul Digital Signaling: System 85/G2 to System 85/G2 Via ISDN PRI

DCIU

OR

TN760

(TIE TRUNK)

TN722

OR TN767

(DS1)

GENERIC 2

WITH

UNIVERSAL

MODULE

DCIU

SN232

(TIE TRUNK)

ANN11

(DS1)

SYSTEM 85/G2

WITH

TRADITIONAL

MODULE

SIGNALING CHANNEL

RS449	105A	RS449
	IDI
ANALOG OR DS1 VOICE CHANNEL

DCIU

SN233

(TIE TRUNK)

ANN11

(DS1)

SYSTEM 85/G2

WITH

TRADITIONAL

MODULE

DCIU

OR

TN760

(TIE TRUNK)

TN722

OR TN767

(DS1)

GENERIC 2

WITH

UNIVERSAL

MODULE

Figure 6-14.Short Haul Analog Signaling: System 85/G2 to System 85/G2 — Direct Via IDI (Isolating Data Interface)