ZyXEL Communications omni series user manual Configuring the V.120 mode

support out-of-band signaling, network signals are transmitted through the B channels. This reduces the bandwidth to 56Kbps.

When you are making a V.120 call, make sure that the communication supports out-of-band signaling. If it does not support out-of-band signaling, you will need to set your TA to 56K mode using the AT&E1 command (AT&E0 to set it back to 64k mode.) If your TA is on the receiving end, you can keep the setting at AT&E0, 64k data mode. The TA will automatically switch between the two speeds in answer mode.

Configuring the V.120 mode

To configure for a 56K V.120 call, type:

ATB20<Enter> (Select V.120 for communication)

TA responds:

OK

Type:

AT&E1<Enter> (Select 56K data mode)

TA responds:

OK

Now you are ready to dial the phone number. If you need to save the setting into non-volatile RAM, issue the commands:

Type:

AT&W0<Enter> (Save the settings to profile 0) [Profiles available: 0-3]

TA responds:

OK

Type:

ATZ0<Enter> (Save stored settings as the power on settings to profile 0) [Profiles available: 0-3]

TA responds:

OK

58 V.120 ISDN Communications