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S-Register: S44
Function:
Unit:
Range:
Default:
Description:Controls the ring frequency from the POTS port. S44=n where:
S-register: S45
Function:
Unit:
Range:
Default:
Description:S45 allows the TA either to generate a dial tone on the POTS port, block any
S-Register: S46
Function:
Unit:
Range:
Default:
Description:Controls pulse-dial recognition for New Zealand, Sweden, and the de facto
S-register: S49
Function:
Unit:
Range:
Default:
Description:Allows POTS port dial tone gain to be adjusted to an appropriate volume.
MTA128ST-USB
Chapter 4 - AT Commands, S-Registers and Result Codes
POTS Port Ring Frequency
Decimal ASCII code
2–4
2 (25 Hz)
n=2
25 Hz ring frequency
n=3
20 Hz ring frequency
n=4
16.67 Hz ring frequency
Use Dial Tone from Central Office
Decimal ASCII code
n=0
No dial tone
n=1
Use Central Office dial tone
n=2
TA generates dial tone
1 (Use Central Office dial tone)
dial tone on the POTS port, or allow the dial tone from the central office to
pass through to the POTS port (default). Some countries have central offices
that send a loud dial tone through to the POTS port. This makes DTMF-
dialing difficult since DTMF digits have to overcome the loudness of the dial
tone (see S49 and S51 for more information).
Pulse-Dial Recognition
Decimal ASCII code
0–3
0
standard for the rest of the world (England, France, India, and USA). S46
selects country where the TA is being used to recognize pulse-dialing. S46=n
where:
n=0
Disable pulse-dialing (default)
n=1
England, France, India, USA, etc. (# pulses = digit dialed except 0 is
10 pulses)
n=2
New Zealand (# pulses = 10 digits dialed)
n=3
Sweden (# pulses = digit dialed + 1)
POTS Port Dial Tone Gain
Decimal ASCII code
n=0 (Low gain—quiet) thru 10 (high gain—loud)
0 (Low gain—quiet)
Must be used in conjunction with S51=1 in order for there to be a noticed
change in the dial tone volume. See S51.
47
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