Telos ZephyrExpress user manual Menu Details, Codec menu

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.

1The 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.

2The distant transmitter must compatible. ZephyrExpress can use different receive and transmit algorithms at the same time.

3We 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.

MENUS 6-11