Best-Effort Call Answering; Ambiguity Resolution Switch For Voice Calls - ZyXEL Communications omni TA128 User Manual

found in MSN ISDN data lists, all Speech (Voice) calls will be sent
to either Phone 1 or Phone 2. Which entry to use would depend on
the type of data call that you are expecting. If you only expect PPP
calls, you should enter the number that the remote user will use to
dial in entry #3 (AT&ZI3=xxx) or entry #5 (A&ZI5=xxx). Once
this is set, the TA128 will attempt to use PPP protocol to
handshake with the remote site whenever a caller dials into this
number.

Best-effort call answering

If some numbers have been set using the &ZIn command (this can
be seen by issuing the AT&ZI? command) and they are not
matched with the address of the incoming call, the TA128 will, by
default, ignore the call as it may be intended for other devices that
share the same S/T interface (S0 bus) with the TA128.
If you want the TA128 to answer inbound calls using all possible
protocols, you can set the best-effort call answering bit as follows:
Command
ATS119.3=0
ATS119.3=1

Ambiguity resolution switch for voice calls

For a Speech or voice-band-data call, if the &ZI number
assignment can tell which of the analog adapters is being
addressed, then the call will be delivered to the proper destination.
But sometimes, ambiguity of address matching may exist. This
may happen if the &ZIn numbers of the various protocols are
either unassigned or not matched. In this case, users may wish to
set answering priority to an analog port. The AT&Ln command
sets the address ambiguity resolution flag as follows:
AT&L0 - Analog adapter 1 has the higher priority to answer a
voice or voice-band-analog-data call; if analog adapter 1 is busy,
the call will be routed to analog adapter 2.
Function
Answer call only when number matched. (default)
Best effort call answering.
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