Specifications

5
Dialing sequence
The dialing sequence of the telephone numbers is from #1 to #7 on the phone-book of the
mobile phone’s SIM card. #1 and #2 receive SMS messge only. For #3~ #7, if there is no
answer in 20 seconds, the GSM-DL2 would stop calling and redial this number after 5 seconds.
In case, still unanswered, it skips to dial the next telephone number. If the called party anwers in
20 seconds, it will play once the voice message (10 seconds), and then enables the listen-in
function for 3 minutes, and terminates the call automatically. After that, it continues to dial the
next number. If the called party hangs up the phone before the end of 3 minutes, the GSM-DL2
disconnects the line immediately, and dials the next number after 5 seconds.
For unaswered numbers #3 ~#7, the dialing cycle will
repeat once
again, then terminates dialing.
During the dialing cycle, if you Disarm the GSM-DL2, it terminates the dialing too.
Listen-in
Only the telephone numbers in the SIM card phone book #1 ~#4 are allowed to dial in for
listen-in, and only when the GSM-DL2 is armed. Max. 3 minutes for each call. But you have to
make sure your telephone sends caller ID (and you turn on this option on your mobile
phone too); otherwise, it can’t work. For not to alert the intruder, you should turn off the ring
sound on the mobile phone in advance, which connects with the GSM-DL2.
Remarks: The connected mobile phone would probably interfere the sound quality when
listening in or playing voice, to reduce noise, keep the mobile phone little further
away from GSM-DL2.
Specifications
Supply voltage : 9 V ~ 15VDC
Maximum current @ charging : About 200 mA.
Maximum current @ without phone : About 13 mA.
Working temperature : -20 ~ +55 degree C.
Recorded Voice length : 10 seconds
Contact numbers : max. 7 numbers. Two for SMS, Five for voice transmission.
Listen-in time : max. 3 minutes