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Technical Reference for ZyXEL omni.net series
4-10
Data Over Speech Channel (for ZyXEL omni.net
LCD/LCD+M/Plus)
If you are expecting ISDN data calls through the Speech (Voice) channel, you need to setup MSN
for that purpose. To the omni.net, 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]. Once this is set, the omni.net will
attempt to use PPP protocol to handshake with the remote site whenever a caller dials into this
number.
Best-effort Call Answering (for ZyXEL omni.net
LCD/LCD+M/Plus)
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 omni.net will, by
default, ignore the call as it may be intended for other devices that share the same S/T interface (S/T
bus) with the ISDN TA.
If you want the omni.net to answer inbound calls using all possible protocols, you can set the
best-effort call answering bit as follows:
Command Description
ATS119.3=0
Answer call only when number matched (default)
ATS119.3=1
Best effort call answering
Table 27. AT Commands for Best-effort Call Answering
Ambiguity Resolution Switch for Voice Calls (for omni.net
LCD/LCD+M/Plus)
Voice calls are routed to one or both of the POTS ports (Phone 1 or/and Phone 2) when they are
received. /and Phone 2) when they are received. You can choose the POTS port you want to receive
calls by setting the MSN (command [AT&Zin=s], as described in a previous table) to a specific