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

Chapter 4 – Voice Commands 

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 

 

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Result Codes:  OK if command accepted; ERROR if the <label> parameter is out of range or if the 

modem cannot service the <label> parameter requested.  

Description: 

+VLS= causes the modem to select one or more source and destination devices for the 
analog data to be transmitted. The parameter <label> identifies each of the supported 
analog source/destination hardware devices. Codes, called "primitives", are provided to 
describe which voice I/O device(s) are components in a possible hardware configuration. 
The codes are grouped to help define and label 16 common hardware configurations. 
Each code, except "L" and "T" is followed by an ASCII 0 code (20 hex). Two codes can 
be concatenated to define a possible analog source/destination hardware configuration.  
Code Description 
L 

Local phone (no number code) 

T 

Telco line  (no number code) 

M0 Internal 

microphone 

M1 External 

microphone 

S0 

Internal speaker (requires squelch on any microphone activity) 

S1 

External speaker (requires squelch on any microphone activity) 

H0 

External microphone and speaker combination (handset or headset) 

Zn 

Manufacturer specific device (n>0) 

Mn 

Manufacturer specific extension (n>1) 

Sn 

Manufacturer specific extension (n>1) 

Hn 

Manufacturer specific extension (n>0) 

The list below contains 16 commonly used hardware configurations, label, and codes 
used to select each configuration.  

0 

none 

Modem on-hook.  Local phone connected to Telco. 

1 

T 

Modem off-hook, and connected to Telco. Local phone provided with 
power to detect hook condition.  

2 

L 

Modem off-hook. Local phone connected to modem.  

3 

LT 

Modem off-hook. Local phone connected to Telco. Modem connected to 
Telco.  

4 

S 

Internal speaker connected to the modem. Modem is on-hook. Local 
phone connected to Telco.  

5 

ST 

Internal speaker connected to Telco. Modem off-hook. Modem 
connected to Telco. Local phone provided with power to detect hook 
condition.   

6 

M 

Internal microphone connected to modem. Modem is on-hook. Local 
phone connected to Telco.  

7 

MST 

Internal microphone and internal speaker connected to Telco.  
Squelching active. Modem is off-hook, and connected to Telco. Local 
phone provided with power to detect hook condition. 

8 

S1 

External speaker connected to modem. Modem is on-hook. Local phone 
connected to Telco.  

9 

S1T 

External speaker connected to Telco. Modem is off-hook and connected 
to Telco. Local phone provided with power to detect hook condition. 

10 

MS1T  Internal microphone and external speaker connected to Telco.  

Squelching active. Modem is off-hook, and connected to Telco. Local 
phone provided with power to detect hook condition. 

11 

M1 

External microphone connected to modem.  Modem is off-hook. Local 
phone connected to Telco.  

12 

M1ST  External microphone and internal speaker connected to Telco.  

Squelching active. Modem is off-hook, and connected to Telco.  

 

 

Local phone provided with power to detect hook condition. 

13 

M1S1T  External microphone and external speaker connected to Telco.  

Squelching active. Modem is off-hook, and connected to Telco. Local 
phone provided with power to detect hook condition.  

14 

H 

External microphone and speaker combination (handset or headset) 
connected to modem. Modem is off-hook. Local phone connected to 
Telco.