Reference Guide for the Model XM128 ISDN Digital Modem
Answering a Call Using MSN
When answering an incoming call, the call is first identified if the caller number matches the Multiple Subscriber Number (MSN) settings.
The MSN supplementary service enables multiple ISDN numbers to be assigned to a single ISDN BRI line. It allows the caller to select, through the public network, one or more distinct terminals from a variety of terminal choices. The Model XM128 modem supports many different communication protocols and two analog adapters. Table
Table | Commands for assigning ISDN numbers | |
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Command |
| Description |
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&ZI0=s |
| Assigns the MSN phone number for X.75 |
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&ZI1=s |
| Assigns the MSN phone number for V.110 |
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&ZI2=s |
| Assigns the MSN phone number for V.120 |
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&ZI3=s |
| Assigns the MSN phone number for PPP, MPPP |
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&ZI4=s |
| Assigns the MSN phone number for ISDN data, |
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| protocol |
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&ZI5=s |
| Assigns the MSN phone number for PPP, MPPP |
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&ZI6=s |
| Assigns the MSN phone number for Phone 2 |
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&ZI7=s |
| Assigns the MSN phone number for Phone 1 |
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The command AT&ZI? can be used to display the MSN numbers. The factory default for these numbers is UNASSIGNED.
ISDN Overview |