Motorola G24 Guide User Manual

Chapter 3: AT Commands Reference
December 31, 2007 AT Commands Reference Manual 3-45
The following table shows the +MTTY parameters.
Notes:
VCO: Voice Carry Over is intended for people who cannot hear but are able to speak
clearly. During a VCO relay call, the Deaf or Hard-of-Hearing caller speaks directly to
the person they are conversing with. When that person responds, a Communication
Assistant (CA) will type back exactly what is said and it will appear on the screen of your
TTY or VCO phone.
HCO: Hearing Carry Over allows Speech Disabled callers who can hear well on the
telephone to listen directly to the person they are talking with. The Speech Disabled Relay
user types his or her part of the conversation on a TTY. A Communication Assistant (CA)
then speaks the typed conversation, word for word, to the standard telephone user.
Figure 3-1 shows the TTY hardware configuration.
Figure 3-1: TTY Hardware Configuration
Example
AT+MTTY=?
+MTTY: (0-3)
OK
AT+MTTY=1
Table 3-20: +MTTY Parameters
<Parameter> Description
<n> 0 Normal voice mode.
1 Full TTY mode (both uplink and downlink support TTY data; used when both
side parties are deaf).
2 VCO mode (Voice Carry Over- uplink is voice active downlink is TTY).
3 HCO mode (Hearing Carry Over-downlink is voice active uplink is TTY).
The default value:
• On Power Up - as previously saved in FLEX bytes.
• Before set command is first used, mode is set to Normal voice mode.
AT Commands
Terminal
Communication
Path
TTY Terminal 1
Note: TTY terminal 1 is connected to
G24 via headset connector.
G24/Telephone
TTY Terminal 2
Headset
Connection
G24

Motorola G24 Guide Specifications

General

Brand	Motorola
Model	G24 Guide
Category	Telephone Accessories
Language	English