Lucent Technologies Host-Based Controller Modem AT Data Addendum page 47

Data Addendum
June 15, 1998
AT Voice Commands Reference (continued)
AT+VRA=<interval>
The modem uses the ringback goes away timer when originating a call.
This command sets this timer to the amount of time the modem shall wait between ringbacks before assuming
that the remote station has gone off-hook.
AT+VRA?
AT+VRA=?
AT+VRN=<interval>
The modem uses the ringback never appeared timer when originating a call.
The AT+VRN command sets this timer to the amount of time that the modem shall spend looking for an initial
ringback. If ringback is not detected within this interval, the modem shall assume that the remote station has
gone off-hook.
AT+VRN?
AT+VRN=?
AT+VPR=<rate>
The AT+VPR command returns an OK for any rate but has no action.
Events Reported to the DTE :
The modem will return OK when going off-hook in voice mode (+FCLASS=8). After answering in voice mode, the
modem may send any of the following <DLE> shielded event codes to the DTE, as appropriate:
<DLE> Codes Sent to DCE:
For simple actions in voice mode, the modem may send any of the following <DLE> shielded event codes
(in ASCII) to the DTE, as appropriate:
Version 1.0
Ringback Goes Away Timer
Returns the current value.
Returns the range of supported values.
Ringback Never Appeared Timer
Returns the current value.
Returns the supported values.
Select DTE/DCE Interface Rate
<DLE> Shielded Codes Sent from DCE to DTE
Code Character
0 9, A D, #, *
a
b
c
d
e
h
H
R
s
<ETX>
@
<DLE> Shielded Codes Sent from DTE to DCE
Code Character
u
d
<ETX>
!
Lucent Technologies Inc.
Host-Based Controller Modem
AT Command Set
Description
DTMF tones
Answer tone
Busy tone
Fax calling tone
Dial tone
Data calling tone
Local phone on-hook
Local phone off-hook
Ring
Silence timer has expired
End of voice data transmission
CAS tone detected
Description
Bump up the volume by 1 dB
Bump down the volume by 1 dB
End of voice data transmission
End receive data state
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