Motorola G24 Guide Developer's Manual page 129

The following table shows the +MTTY parameters.
<Parameter>
<n>
Notes:
Figure 3-1
Figure 3-1: TTY Hardware Configuration
Example
AT+MTTY=?
+MTTY: (0-3)
OK
AT+MTTY=1
December 31, 2007
Table 3-20: +MTTY Parameters
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.
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.
shows the TTY hardware configuration.
AT Commands
Terminal
Note: TTY terminal 1 is connected to
G24 via headset connector.
AT Commands Reference Manual
Chapter 3: AT Commands Reference
Description
Communication
Path
G24
Headset
Connection
TTY Terminal 1
G24/Telephone
TTY Terminal 2
3-45