RoadRunner
U S E R S G U I D E
77
AT&T 5ESS - National ISDN 1
Request from the telephone companies a National ISDN 1 ISDN line in a
“multipoint” configuration with 2B1Q line code. The optional
“multipoint” configuration will allow you to have a separate telephone
number for each B-channel; however, it will physically be only one ISDN
line. The Telephone Company should supply you with a different
telephone number and SPID (Service Profile Identification) for each B-
channel in a multipoint arrangement. Your ISDN line must be configured
to allow circuit switched data on both B-channels and signaling on the D-
channel. Request that the Telephone Company program your ISDN line
with the following attributes:
n
Maximum terminals set to 2 (this tells the switch that there are 2
terminals active on this line.)
n
Maximum B-channels set to 2; Actual User settings (this tells the switch
that you are an actual user and may use both B-channels
simultaneously.)
n
Circuit switched data set to 2; circuit switched data channel set to any
(this tells the switch that you may use both B-channels simultaneously.
The “Any” tells the switch that either B-channel can be used for data.)
n
Terminal type is Type A - Basic Terminal (this tells the switch you are
a basic ISDN terminal.)
n
Display set to Yes (this tells the switch that you have display
capabilities.)
n
Circuit switched data limit set to 2 (this tells the switch that you may
receive 2 data calls.)
n
Call appearance preference set to Idle (this tells the switch that your
software will make a positive choice of which cal appearance it will use
to initiate a call.)
The telephone company will also need to know any additional voice
features that you require on your ISDN lines. Examples of these features
are Caller ID and Call Forwarding. PLEASE REMEMBER TO SPECIFY A
LONG DISTANCE CARRIER.
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