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6-12 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)
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System 75 or Generic 1 (G1) to System 85 or Generic 2 (G2)
RS232C
TO RS449
CONVERSION
MTDM
DCP
RS449
DSU
DSU
RS232C
ANALOG OR DS1 VOICE CHANNEL
SIGNALING CHANNEL
SN233
(TIE TRUNK)
ANN11
(DS1)
DCIU
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
PI
TN754
(DIGITAL LINE)
SYSTEM 85/G2
WITH
TRADITIONAL
MODULE
DCIU
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
OR
SYSTEM 75/G1
GENERIC 2
WITH
UNIVERSAL
MODULE
Figure 6-15. Short Haul Analog Signaling: System 75/G1 to System 85/G2 — Direct Via DSU
SYSTEM 75/G1
OR
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
DCIU
SYSTEM 85/G2
WITH
TRADITIONAL
MODULE
TN754
(DIGITAL LINE)
PI
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
DCIU
SN233
(TIE TRUNK)
ANN11
(DS1)
RS232C
TO RS449
CONVERSION
SIGNALING CHANNEL
ANALOG OR DS1 VOICE CHANNEL
RS449 RS232C
RS232C DCP
MTDM
MODEM
MODEM
GENERIC 2
WITH
UNIVERSAL
MODULE
Figure 6-16. Long Haul Analog Signaling: System 75/G1 to System 85/G2 — Direct Via Modem