Technical Reference for ZyXEL omni.net series
4-7
Placing a Data Call
While placing a voice call can be as simple as dialing out with your analog phone, initiating a data
call requires prior selection of a proper B-channel protocol. Here are some simple commands that
will be useful when placing a call. The omni.net has the capability to automatically detect the
B-channel protocol (V.120, X.75, or PPP) used by the answer site.
AT Command
Description
ATBnn
Changes ISDN B channel protocol setting.
ATDL
Re-dials the last dialed telephone number.
Table 24. AT Command for Placing a Data Call
Multi-Auto Dial Out (MDO) for Outgoing Data Calls
With the Multi-Auto Dial Out function, your omni.net automatically tries the outgoing data
protocol with the predefined protocol sequence set by the commands [ATB90-97], as listed in the
following table.
AT Command
MDO Protocol Trial Sequence
ATB90
PPP+X.75
ATB91
PPP+X.75+T.70+ISO8208+T.90+BTX
ATB92
X.75+T.70+ISO8208+T.90+BTX+PPP
ATB93
PPP+V.120
ATB94
V.120+PPP
ATB95
PPP+X.75+V.120 (* default for DSS1)
ATB96
PPP+V.120+X.75 (* default for U.S.A.)
ATB97
X.75+V.120+PPP
Note:
Bundle call is not supported in MDO X.75+V.120+PPP
Table 25. MDO AT Command
Incoming Calls
This chapter provides guidelines for setting up the your omni.net to answer calls.
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