MENUS 6-11
Menu Details

Codec menu

The first item in this menu is the Codec Setup. See page 6-6.
— Transmit Selects the transmit coding algorithm1:
L3-DUAL
L3-STEREO
L3-JOINT
G.722
L2-MONO64
L2-MONO128
L2-DUAL (may appear as L2-STEREO)
L2-JOINT
L2-HALF/24
— Receive Selects the receive coding algorithm2:
L3-STEREO
L3-MONO
G.722
L2
L2-HALF/24
— Bitrate 56kbps or 64kpbs per ISDN channel3. Both lines will use the same rate.
In most modes, ZephyrExpress will automatically adapt to the in-
coming bitrate when accepting a data call. The bitrate can be changed
while a call is in progress, but audio will be lost while the system re-
synchronizes. If the bitrate is manually changed while a call is in pro-
gress, ZephyrExpress can’t auto-adapt and audio will be lost until it’s
changed back.
1 The distant receiver must be compatible. You can use the DUAL mono or G.722 settings to
send to two sites at once. Details on choosing an appropriate algorithm appear in Section
5, Coding.
2 The distant transmitter must compatible. ZephyrExpress can use different receive and
transmit algorithms at the same time.
3 We refer to a per-line bitrate, even for two-line calls. Some other manufacturers refer to
the total bitrate of 112kbps or 128kpbs for two-line calls. It means the same thing.