Technical Reference for ZyXEL omni.net series
X.75 Outgoing ProtocolThe X.75 protocol can be chosen using the following AT commands:
| AT Command |
| Description |
|
ATB00 |
| X.75 with transparent layer 3. |
| |
|
|
|
| |
ATB01 |
| X.75 with T.70 NL. |
| |
|
|
|
|
|
The ATB0x commands not only specify the outgoing protocol, but also set the default layer 3 for an incoming X.75 call without layer 3 information. It is important for both ends of an X.75 connection to execute the same
For European ISDN (DSS1), the
Table 46. X.75 Outgoing Protocol
Synchronous Connections (for omni.net LCD/LCD+M)The ZyXEL omni.net LCD/LCD+M has synchronous mode included for transfering the data synchronously. Use the following commands to choose the data rate for synchronous operation:
| AT Command |
|
|
| Data Rate |
|
ATB11 |
|
|
| 64000bps |
| |
ATB19 |
|
|
| 56000bps |
| |
|
| Table 47. AT Command for Synchronous Connections |
|
There are two modes of synchronous operation:
Asynchronous commands, synchronous data (AT&M1): The omni.net LCD/LCD+M acceptsAT commands in asynchronous mode. Once the call is connected, it enters synchronous mode for data transmission.
Synchronous mode (AT&M3*I1): The omni.net LCD/LCD+M accepts synchronous commands from V.25 bis or a PC with an