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Multiple
Subscriber
Numbering
(MSN)
Single
Extension
Numbering
Page 4 Modular Plus Programming and Feature Card for ISDN Terminals
Norstar supports MSN on ISDN S-loops. For MSN capability, assign an ISDN extension
number (default range 509-540) for each of the ISDN devices on the loop, up to a
maximum of 8.
Once an ISDN device is installed, programme the terminal to recognise the extension
number assigned to it. The extension number is used by Norstar as the terminal address
for that device.
The device must accept a terminal address of the same length as the system numbering
plan (3 to 7 digits). See the instructions accompanying the device for information on how
to programme it to recognize its assigned extension number.
All ISDN terminals on the loop that have not been assigned a specific extension number
will ring for any internal or external call made to the S-loop
CCU
Voice terminal
ISDN extn 509
For single extension numbering, assign only one Loop extension number (default range
509-540) for the S-loop.
Once an ISDN device is installed, programme the terminal to recognise the extension
number assigned to it. The extension number is used by Norstar as the terminal address
for that device.
The device must accept an address of the same length as the system numbering plan (3
to 7 digits). See the instructions accompanying the device for information on how to
programme it to recognize its assigned Loop extension number.
All ISDN terminals on the loop that have not been assigned a specific extension number
will ring for any internal or external call made to the S-loop.
Single extension numbering (Loop extension number rings all terminals)
CCU
Loop extension
number 509
MSN S-loop
(maximum 8 devices on loop)
(2 B-channels per loop)
Data terminal
Voice terminal
ISDN extn 523
ISDN extn 510
Video terminal
ISDN extn 514
(maximum 8 devices on loop)
(2 B-channels per loop)
Voice terminal
Voice terminal
Voice terminal
ISDN extn 511
Video terminal
Voice terminal
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