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430 APPENDIX E: CALLER ID
External ISDN BRI Calls
An external call arrives at an NBX system on an ISDN BRI channel and is
routed to A’s telephone.
When A transfers the call to B, the Caller ID (if any is provided by the
telephone company) appears for five seconds in the top line of B’s
telephone display panel. If no caller ID information is available, the Trunk
name and channel number from the Digital Line Card appear on the top
line of B’s telephone display panel. A’s ID appears on the bottom line.
External ISDN PRI Calls
An external call arrives at an NBX system on an ISDN PRI channel and is
routed to A’s telephone.
When A transfers the call to B, the Caller ID (if any is provided by the
telephone company) appears for five seconds in the top line of B’s
telephone display panel. If no caller ID information is available, the Trunk
name and channel number from the Digital Line Card appear on the top
line of B’s telephone display panel. A’s ID appears on the bottom line.
External T1 Calls
An external call arrives at an NBX system on a T1 channel and is routed to
telephone A. If the call is transferred to B, the display of caller ID
information on B’s telephone depends on which Incoming Call Digit
Format is configured on the T1 board.
■ DNIS/DID — The T1 board is configured to expect either Dialed
Number Identification System digits or Direct Inward Dialing digits.
If DNIS digits arrive, there is no Caller ID information. Instead, the NBX
system displays the name of the T1 trunk and the extension associated
with the T1 channel.
■ DNISANI — The T1 board is configured to expect Dialed Number
Identification System digits followed by Automatic Number
Identification digits.
The NBX system displays the ANI portion of the incoming digit
sequence followed by the name of the T1 trunk and the extension
associate with the T1 channel. The ANI field can be configured to
capture either 7 or 10 digits of ANI information.