Multi-Tech Systems MT5634SMI V.92 ユーザーズマニュアル

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Chapter 4 – Voice Commands 
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 
 
116    
 
Command: +VDR=<enable>,<report>  Enable/Disable Distinctive Ring (Ring Cadence 
Reporting) 
Values: 
See the Description 
Result Codes:  OK if the modem accepts the command; ERROR if the parameter is out of range.  
Description: 
The +VDR command causes the modem to enable or disable reporting of the ring 
cadence information, and to control the timing of the Ring event code report if ring 
cadence reporting is enabled.   
 
This report format is one line per silence period, and one line per ring period. The length 
of the silence period is in the form DROF=<number in units of 0.1 seconds><CR><LF>, 
and the length of the ring in the form DRON=<number in units of 0.1 seconds>. The 
<LR> character is optional. The modem may produce a Ring event code after the DRON 
message if enabled by the <report> parameter. The <report> parameter should be set to 
a value larger than the expected off-times within a single pattern so that the Ring event 
reports are issued only during the off-times between the complex patterns.  
<enable> <report> Description 
N/A 
The modem will not generate ring cadence reports. Other call 
progress event codes (including Ring) are reported as normal. 
The modem only produces DROF and DRON messages. Other 
call progress result codes (including RING) are reported as normal. 
non-zero 
The modem only produces DROF and DRON messages. The 
RING result code is displayed after the falling edge of the ring 
pulse (i.e., after the DRON report). 
2–255 
non-zero 
Reserved for future standards.  
Example:  The lines below shows a cadence with an off time of 4.0 seconds, an on time 
of 0.8 seconds, an off time of 0.4 seconds, and an on time of 0.8 seconds.  The RING 
result code is displayed 0.5 seconds after the last DRON message. The command to 
enable this sample sequence is +VDR-1,5 , as shown below: 
<DLE><X> 
DROF=40 
DRON=8 
DROF=4 
DRON=8 
RING 
<DLE><.> 
<DLE><X> 
DROF=40 
DRON=8 
DROF=4 
DRON=8 
RING 
<DLE><.>