Netgear XM128 ISDN User Manual Page 75

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Reference Guide for the Model XM128 ISDN Digital Modem
Advanced ISDN 7-7
The EAZ (last digit) of the destination address in an incoming setup message is checked with the
protocol of each EAZ. If there is a match and the service indicated is compatible with this protocol,
the call be accepted using the protocol.
The suffix digit to an ISDN phone number in a dial-out command is used as the destination EAZ
(in the Destination Address W-element) in the setup message sent to the destination. If this suffix
digit is omitted, the switch assumes the EAZ as 0.
Each type of outgoing call of the XM128 can be assigned with one origination EAZ by using the
command AT&ZOx=Origination_EAZ (where x = I for ISDN data calls, A for the analog adapter
1, and B for the analog adapter 2).
The command AT&ZOx=// removes the assignment of the origination EAZ.
The number assigned by AT&ZOx=Origination_EAZ, if any, can be used for the Origination
Address W-element while dialing. The default settings of origination EAZ of all the types of calls
are UNASSIGNED, meaning the setup message sent by the Model XM128 modem contains no
Origination Address W-element.
The command AT&ZO? can be used to list the current settings of the origination EAZs.
Answering a Call
The incoming call first must be identified as either an ISDN data call or a voice call (including the
voice-band-data call). ISDN data calls are routed to the digital communications portion of the
Model XM128 modem. Voice calls or voice-band data calls are assigned to the analog adapters.
Answering a Call for DSS1
The Multiple Subscriber Number (MSN) supplementary service provides the possibility for
assigning multiple ISDN numbers to a single ISDN BRI line. Calling users can select, via the
public network, one or more distinct terminals on a BRI line.
Note:
The EAZs must be assigned precisely in order to accept calls accordingly.
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