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Reference Guide for the Model XM128 ISDN Digital Modem
Control of EAZ (ENDGERÄTEAUSWAHLZIFFER)
EAZ (or terminal selection code) is the last digit of an ISDN phone number in 1TR6. Usually
EAZ=0 indicates that a global call (any terminal on the S0 interface), which is service-compatible
with the incoming call, can answer the call.
Other values of EAZ (1,2,....,9) provide the possibility for assigning multiple ISDN numbers to
a single ISDN BRI line. A calling user can select, via the public network, one or more distinct
terminals on a single BRI line.
With its highly integrated, multifunction features, the Model XM128 modem can be imagined as
a "black box" containing multiple distinct terminals. Each of these "internal terminals" can be
assigned one EAZ using the command AT&ZIn=m, where n=0-7 and m= 0-9.
Command Function
The following commands are used for assigning EAZs:
•
&ZI0=massigns EAZ for X.75
•
&ZI1=massigns EAZ for V.110
•
&ZI2=massigns EAZ for V.120
•
&ZI3=massigns EAZ for PPP, MPPP
•
&ZI4=massigns EAZ for ISDN data, protocol auto-detection
•
&ZI5=massigns EAZ for PPP, MPPP
•
&ZI6=massigns EAZ for PHONE 2
•
&ZI7=massigns EAZ for PHONE 1
The default EAZ of each protocol is as follows:
•
&ZI0=1 for data
•
&ZI4=2 for data
•
&ZI6=3 for the analog adapter, PHONE 2
•
&ZI7=4 for the analog adapter, PHONE 1
•
T&ZI? for displaying the EAZ numbers assigned by the AT&ZIn=m commands
7-6
Advanced ISDN
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