AT&T 7400 series, 7500 series, 7100 series, 2500 series, 7200 series, 7300 series manual MPDM/M1

8-24PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS

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Table 8-6.Requirements for Connections from the PBX to SDS/SDDN

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⎜

⎜

⎜

COMM TYPE

⎜

TRUNK TYPE

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜FACILITIES

⎜

CALL

⎜

⎜

⎜

⎜

⎜

RECOMMENDED

⎜

NETWORK

⎜ NOTES

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

DATA MODULE

⎜

CHANNEL

⎜

⎜

⎜

⎜ SETUP

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

S75

⎜

G1

⎜

S85

⎜

G2

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜Robbed Bit

⎜Dial-up

⎜Mode 1 = MPDM/M1*

⎜Restricted or ⎜1,2,4,

⎜

⎜Data ⎜Data

⎜TT†=109 ⎜TT=41

⎜through a

⎜

⎜

⎜

⎜(DMI)

⎜

⎜

7500B

⎜Unrestricted

⎜5,6

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜DS1 (see

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜figure 8-14)

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜Domestic

⎜Dial-up

⎜N/A

Data or

⎜TT=41

TT=41

⎜Mode 0 =

MPDM/M1* ⎜Restricted or ⎜2,4,5

⎜

⎜Network

⎜

⎜

⎜AVD

⎜Signaling ⎜Signaling

⎜

7500B

⎜Unrestricted

⎜7,8,9

⎜

⎜w/ISDN/PRI

⎜

⎜

⎜

⎜Type=20

⎜

⎜

⎜

⎜

⎜

⎜

⎜Type=20

⎜(see figure

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜8-15)

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜Mode 1 =

MPDM/M1*

⎜Restricted or ⎜2,4,5,7

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

7500B

⎜Unrestricted

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜Mode 2 =

MPDM

⎜Restricted

⎜3,4,5,7

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

7400A or B

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜Mode 3 =

PC/PBX

⎜Restricted

⎜4

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

AUDIX

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

7500B

⎜

⎜4,5

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

Dial-up

⎜

N/A

⎜

N/A

⎜

Mode 0 =

7500B

⎜

Unrestricted

⎜

4,5,8

⎜

Intern’l

⎜N/A

⎜ISDN-PRI

⎜Network

⎜

⎜

⎜

⎜

⎜TT=41

⎜

MPDM

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜w/ISDN-PRI

⎜

⎜

⎜

Signaling

⎜

⎜

⎜

⎜

⎜(see figure

⎜

⎜

⎜

⎜

⎜Type=20

⎜

⎜

⎜

⎜

⎜8-16)

⎜

⎜N/A

⎜

⎜N/A

⎜

⎜Mode 1 =

7500B

⎜Restricted or ⎜2,4

⎜

⎜Data or

⎜

⎜

⎜

⎜

⎜AVD

⎜

⎜

⎜

MPDM

⎜Unrestricted

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

† 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 ACCUNET SW56 modification kit.

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.