77
Chapter 4 - AT Commands, S-Registers, and Result Codes
S-register: S77
Function: V.110 Network Rate Control*
Unit: decimal ASCII code
Range: n=1—use $MB (S76),
n=2—use $MB (S76) or Auto Sync on Answer
Default: 2 (use $MB(S76) or Auto Sync on Answer)
Description:The Network Rate for V.110 will be determined by S76 ($MB). If S77=1,
then the network rate will be set to that of S76 ($MB) and if the network does
not match that of the peer device, then the connection will fail. Properties of
S77=1 apply to both received and originated calls. If the TA will be
answering a V.110 call, then it can be set to auto-synchronize (S77=2) on the
incoming V.110 network rate.
Auto-synchronizing allows the TA to adapt to the client’s network rate without
any need for the host to have its network rate predetermined. If S77=2
and a V.110 call is originated, then the network rate will be that of S76 ($MB).
* The MTA128ST-USB is manufactured in two builds. To determine the build of your terminal
adapter (TA), issue the ATI2 command in a terminal window. If the TA responds to the command
with MTA128ST-USB, then it supports V.110. If your TA resonds to the ATI2 command with
MTA128ST-USB-RC, V.110 support is not available.
S-Register: S80
Function: Persistent DTR Dialing Delay
Unit: 1 second
Range: n=1-255 (1-255 seconds)
Default: 5 (5 seconds)
Description:Once DTR is detected as present (active high) and other conditions required
for the TA to dial are met, a delay of S80 seconds will occur before stored
number 0 is dialed. Some conditions include the TA not being in the
@CONFIG menu, not having a data call present at the time, and Persistent
DTR Dialing must be enabled. By default the TA will delay for 5 seconds
before dialing when all conditions are satisfied.
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