3com SuperStack II Manuel D’Utilisation

This section provides provisioning information for the following switch 
types in the U.S. and Canada:

■

AT&T 5ESS

■

AT&T 5ESS Custom

■

DMS 100 and National ISDN 1

■

Siemens EWSD

To order ISDN service for an AT&T 5ESS switch, provide the telephone 
company with the information in Table 34. 

Table 34   Ordering ISDN Service for an AT&T 5ESS Switch 

Line type

National ISDN 1 line

Line code

2B1Q (2B+D)

Interface type

S/T interface with NT1 (model 43x) or 
U interface (model 44x) and RJ-45 jack

Maximum terminals (MAXTERM)

1

Maximum B channels (MAXB CHNL)

2

Actual user

Yes

Circuit-switched data

2

Circuit-switched data channel

Any

Terminal type

A-Basic or E-Type (data only) Terminal

Display

No 

Circuit-switched data limit

2

Voice or data

Data

Call appearance

Idle

B1

Circuit-switched data

B2

Circuit-switched data

D

Signaling only

MAXTERM

1

MAXB CHNL

2

ACT USR

Y

CSD

2