110 And Synchronous Mode Communications; Answering A V.110 Call - ZyXEL Communications omni TA128 User Manual

7
V.110 and Synchronous
Mode Communications
V.110 is most popular in Japan. The table below shows the
specifications of different ISDN protocols:
Layer 1
Layer 2
Layer 3
Error Control
V.42bis
Async or Sync
Bundle
Max. Line
Speed
AT-Command
Configuration
Note : BONDING protocol for synchronous mode will be F/W upgradeable at
ZyXEL's option.

Answering a V.110 call

Once you set the proper V.110 communication mode, either
asynchronous or synchronous, there is no need to configure the
ISDN mode to the protocol of an incoming call. The TA128 will be
able to determine the correct protocol to use by examining the data
coming in from the remote site if the device is set to auto-answer or
once an answer command is issued.
To allow the TA128 to answer the incoming call, you need to set
S0 to a value greater than 0 (i.e. ATS0=1). If S0 is not set (S0=0),
Synchronous
Transparent
None
None
No
No
Sync
Yes (Note)
64Kbps
128Kbps (Note)
ATB11&M1
(Sync Data)
ATB11&M3*I1
(V.25bis Sync HDLC)
V.110 X.75/V.120
80 Bits HDLC
Framing
None LAPB/LAPD
None ISO8208 T.70
NL/ V.120
No Yes
No Yes
Async Async
No Yes
38.4 Kbps 64Kbps
128Kbps
ATB10 ATB0:
Transparent
ATB01: T.70
NL/ ATB20
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