3Com REMOTE ACCESS SYSTEM 1500, Management Manual

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154 C
HAPTER
10: A
DVANCED
M
ODEM
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ONFIGURATION WITH
CLI/AT
COMMANDS
Universal Connect
Call Flow
The RAS 1500 tries a number of calls and detection processes (Table 45).
Table 45 Universal Connect Call Flow
When you set the RAS 1500 to Universal Connect and make or receive a
call, the RAS 1500 attempts a V.110 connection only if you set S67.0=1.
In Universal Connect answer mode, when V.110 is enabled, the RAS 1500
makes the V.110 attempt third in the Universal Connect sequence.
Answering and
Originating Calls
Use Table 46 to set the answer and originate call type.
Table 46 Answering Call Types
If you set the call to a specific type (*V2=1-6) and the desired connection
cannot be made, the RAS 1500 does not negotiate for other types of
connections. Default configuration to V.120 with X.75 turned off.
Setting the Originate
Call Type
You can set the originate call type for each B-channel. These commands
are only valid when auto detect is used (*V2=0).
These state of these new commands is saved in flash.
Attempt Call Type Protocol Command
1 64 Kbps V.120, X.75, or Synchronous
PPP AT*U1
2 56 Kbps V.120, X.75, or Synchronous
PPP
3 38.4 Kbps V.110 AT*U2
4 3.1 kHz Audio V.34, V.FC, V.32 terbo, and
other analog call types AT*U3
Setting Command
Autodetect AT *V2=0
V.120 rate adaption only AT *V2=1
V.110 rate adaption only AT *V2=2
Modem AT *V2=3
Clear channel synchronous only AT *V2=4
Asynchronous to synchronous PPP only AT *V2=5
X.75 connection only AT *V2=6