AT&T DEFINITY 2500 series Network Manual page 194

9-4
DATA COMMUNICATIONS CONFIGURATIONS
_ ___________________________________________________________________________________________________________________________
_ ___________________________________________________________________________________________________________________________
_ ___________________________________________________________________________________________________________________________
HOST
COMPUTER
MODEM
RS-449
CHANNEL
INTERFACE
UNIT
"829A"
RS-232C
F. SYSTEM 85 (R2V4) OR GENERIC 2 TO SYSTEM 75 OR GENERIC 1 - SOFTWARE CONNECTION USING DS1 FACILITIES
SYSTEM 85/G2
G. SYSTEM 85 OR GENERIC 2 TO SYSTEM 75 OR GENERIC 1 - DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) CONNECTION
USING ANALOG FACILITIES AND SOFTWARE CONNECTION (NOT A PSC/DSC CONNECTION)
Figure 9-1. Dedicated/Permanent Switched Connections — Configurations (Sheet 2-of-2)
S75/S85/G1/G2
MADU
EIA
SWITCH
INTERFACE
(24TH-CHANNEL OR ISDN PRI MOS SIGNALING
COMMUNICATION TYPE MUST BE AVD OR DATA)
D. SYSTEM 75, SYSTEM 85, GENERIC 1, OR GENERIC 2 - PSC/DSC USING PRIVATE
NETWORK DIGITAL FACILITIES AND EIA PORTS
SYSTEM 85, R2V3
DCIU
DS1
24TH-CHANNEL SIGNALING
TIE
TRUNK
SN233
E. SYSTEM 85 (R2V3) TO SYSTEM 85 (R2V3) - DSC USING DS1 FACILITIES
S85/G2
DCIU
GPP
MPDM
SN270
DS1
TRADITIONAL MODULE
(SEE FIGURE 6-17 FOR CONNECTION TO THE GENERIC 2 UNIVERSAL MODULE)
DCIU
RS-449/232
MODEM
EIA
PSC
OR
DSC
MADU
DS1
SWITCH
SYSTEM 85, R2V3
"T1"
TRANSMISSION
FACILITIES
DS1
ROBBED-BIT OR
DSC
CONNECTION
SOFTWARE
CONNECTION
"T1"
24-CHANNEL SIGNALING
SYSTEM 75/G1
SCI/PI
SOFTWARE
CONNECTION
MODEM
UP TO
19.2-KBPS
ASYNC
COMPUTER
OR
PRINTER
DCIU
MODEM
CHANNEL
TIE
INTERFACE
TRUNK
UNIT
SN233
"829A"
S75/G1
SCI/PI
DS1
DIGITAL
LINE PORT
TN754 MTDM
RS-232