ZyXEL Communications omni series User Manual
ISDN Communication Basics 33
Data over Speech Channel
If you are expecting ISDN data calls through the Speech (Voice)
channel, you need to setup MSN for it. For non-data models if no
MSN entries are 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 TA will attempt to use PPP
protocol to handshake with the remote site whenever a caller dials
into this number.
channel, you need to setup MSN for it. For non-data models if no
MSN entries are 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 TA will attempt to use PPP
protocol to handshake with the remote site whenever a caller dials
into this number.
Best-effort call answering (non-data)
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 TA 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 TA.
seen by issuing the AT&ZI? command) and they are not matched
with the address of the incoming call, the TA 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 TA.
If you want the TA to answer inbound calls using all possible
protocols, you can set the best-effort call answering bit as follows:
protocols, you can set the best-effort call answering bit as follows:
Command
Function
ATS119.3=0
Answer call only when number matched. (default)
ATS119.3=1
Best effort call answering.
Ambiguity resolution switch for voice calls (omni.net)
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:
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: