Westermo TR-36 - Manual (Page 29)

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The TR-36 is connected to Power meter which is remotely monitored and the TR-36
shares the PSTN line with normal telephones which is preferred not to give a Ring signal
when the meter is read.
The TR-36 is setup to answer calls on the Caller ID received, the valid numbers to
answer is programmed into the TR-36. There exists a number of standards for sending
Caller ID please check which standard is used by your operator, the TR-36 supports the
major implementations. In this example the DTMF Caller ID version is used. Note some
implementations doesn’t give the possibility to make a silent answer since the Caller ID
is sent between first and second ring signal.
On the originating side any type of modem able to call a PSTN number can be used.
Configure the TR-36
AT&F Set the unit to factory default
AT+IPR=9600 DTE baudrate 9600
AT+ICF=3,4 Character framing 8 data, 1 stop, parity none
ATS0=0 No auto answer on Ring signals
ATQ1E0&C1&K0&A1 Suitable for PLC communication
AT&W Save settings
AT*WACCTAB=1,”016428000”
AT*WACCTAB=2,”016480250” Set the valid A-numbers for automatic answering
AT*WCID=3,3 Set Caller ID to A-number answer with DTMF coded numbers
… Silent answering on predefined numbers TR-36
PSTN
Network