1.20 Integrated Services Digital Network (ISDN) Service Features
Feature Guide 199
• ISDN extensions can belong to an incoming call distribution group ( 1.2.2 Incoming Call
Distribution Group Features) or idle extension hunting group ( 1.2.1 Idle Extension
Hunting). In this case, an MSN can be assigned.
• If the last digit of the MSN is "0", all terminal devices on the same ISDN port receive the
call simultaneously, if the specification of each terminal device is available. To use the
MSN whose last digit is "0" as an individual MSN, system programming is required for
each ISDN port.
Feature Guide References
1.1.1.4 Multiple Subscriber Number (MSN) Ringing Service