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DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-9
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RS232
MTDM
MTDM
DCP
DCP
TN764
(DIGITAL LINE)
PI
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
TN764
(DIGITAL LINE)
PI
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
MODEM
MODEM
SYSTEM 75/G1 SYSTEM 75/G1
SIGNALING CHANNEL
ANALOG OR DS1 VOICE CHANNEL
RS232
Figure 6-7. Long Haul Analog Signaling: System 75/G1 to System 75/G1 Via Modem
24th CHANNEL SIGNALING
USING AVD DS1
PI
TN722
OR TN767
(DS1)
PI
TN722
OR TN767
(DS1)
SYSTEM 75/G1 SYSTEM 75/G1
CSU MAY BE REQ’D AT BOTH ENDS
IF COMMON CARRIER USED
Figure 6-8. Long Haul Digital Signaling: System 75/G1 to System 75/G1 Via AVD DS1
TN767
(PRI)
PI
SYSTEM 75/G1 SYSTEM 75/G1
*ONE OF THE 23 B-CHANNELS IS USED FOR DCS SIGNALING: THE REMAINING 22 CHANNELS CAN BE USED FOR VOICE.
ISDN PRI*
PI
TN767
(PRI)
Figure 6-9. Long Haul Digital Signaling: System 75/G1 to System 75/G1 Via ISDN PRI