ZyXEL Omni TA 128 User Guide - Page 57

V.110 and Synchronous, Mode Communications

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7 V.110 and Synchronous Mode Communications V.110 is most popular in Japan. The table below shows the specifications of different ISDN protocols: Synchronous V.110 X.75/V.120 Layer 1 Transparent 80 Bits HDLC Framing Layer 2 None None LAPB/LAPD Layer 3 None None ISO8208 T.70 NL/ V.120 Error Control No No Yes V.42bis No No Yes Async or Sync Sync Async Async Bundle Yes (Note) No Yes Max. Line 64Kbps 38.4 Kbps 64Kbps Speed 128Kbps (Note) 128Kbps AT-Command ATB11&M1 ATB10 ATB0: Configuration (Sync Data) Transparent ATB11&M3*I1 ATB01: T.70 (V.25bis Sync HDLC) NL/ ATB20 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), 45

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45
7
V.110 and Synchronous
Mode Communications
V.110 is most popular in Japan. The table below shows the
specifications of different ISDN protocols:
Synchronous
V.110
X.75/V.120
Layer 1
Transparent
80 Bits
Framing
HDLC
Layer 2
None
None
LAPB/LAPD
Layer 3
None
None
ISO8208
T.70
NL/ V.120
Error Control
No
No
Yes
V.42bis
No
No
Yes
Async or Sync
Sync
Async
Async
Bundle
Yes (Note)
No
Yes
Max. Line
Speed
64Kbps
128Kbps (Note)
38.4 Kbps
64Kbps
128Kbps
AT-Command
Configuration
ATB11&M1
(Sync Data)
ATB11&M3*I1
(V.25bis Sync HDLC)
ATB10
ATB0:
Transparent
ATB01: T.70
NL/ ATB20
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),