Table 8-6. Requirements For Connections From The Pbx To Sds/Sddn - AT&T DEFINITY 2500 series Network Manual

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PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS
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Table 8-6. Requirements for Connections from the PBX to SDS/SDDN

FACILITIES CALL
SETUP
S75
Robbed Bit Dial-up Data Data
through a
DS1 (see
figure 8-14)
Domestic Dial-up N/A Data or
Network
w/ISDN/PRI
(see figure
8-15)
Intern'l Dial-up N/A N/A
Network
w/ISDN-PRI
(see figure
8-16) N/A Data or
† TT stands for trunk type.
Notes:
1. On the System 85 or Generic 2, trunk type 109 (DMI) prohibits subnet trunking through AAR/ARS.
2. The MPDM requires a V.35 interface and an
3. Older data modules (such as DTDM, 7404 data module, and 7406 and 7407 data stands), can be used for mode-2
connections.
4. The bearer capability class of service must be set appropriately.
5. The 7500B can be used only with the Generic 2 communications system.
6. This connection can be made only from the System 85 (R2V3 or R2V4), Generic 2, Generic 1, and the System
75 (R1V2 or later).
7. This connection can be made only from a System 85 (R2V4), Generic 1, or Generic 2.
8. At mode 0, the MPDM and 7500B cannot be used to communicate with each other unless a bit inversion cable is
used.
9. If the facility is restricted and the MPDM is used, then the customer's DTE should use uninverted HDLC. The
MPDM inverts mode 0 HDLC to satisfy the requirement that an all-zeros octet is never generated. If the DTE is
sending inverted HDLC, then the bit inversion cable should be used.
COMM TYPE TRUNK TYPE
G1 S85
TT†=109 TT=41
(DMI)
TT=41
AVD Signaling Signaling
Type=20 Type=20
N/A
N/A
AVD
ACCUNET
RECOMMENDED
DATA MODULE
G2
Mode 1 = MPDM/M1*
7500B
TT=41 Mode 0 = MPDM/M1* Restricted or 2,4,5
7500B
Mode 1 = MPDM/M1*
7500B
Mode 2 = MPDM
7400A or B
Mode 3 = PC/PBX
AUDIX
7500B
ISDN-PRI Mode 0 = 7500B
TT=41 MPDM
Signaling
Type=20
Mode 1 = 7500B
MPDM
SW56 modification kit.
NETWORK NOTES
CHANNEL
Restricted or 1,2,4,
Unrestricted 5,6
Unrestricted 7,8,9
Restricted or 2,4,5,7
Unrestricted
Restricted 3,4,5,7
Restricted 4
4,5
Unrestricted 4,5,8
Restricted or 2,4
Unrestricted