Grant's Automation
AN1808-12M
4G
Audio Intercom (E2.2)
16/16
Q. There is no audio from the gate, but the person at the gate can hear ok.
A. This can be due to low reception.
-Check reception level by *20#.
-Change SIM card if necessary to another network which may have better coverage.
-Purchase a high gain antenna.
Q. The audio quality that can be heard on the remote telephone is poor or humming
(buzzing).
A. A small amount of GSM buzz can be considered normal on intercoms, but not so much that causes
inability to hear the person speaking. This can be caused by the GSM antenna being mounted too
close to the speech panel or not mounted high enough.
-Try earthing the speech panel chassis to 0V of the power supply.
-This is also a symptom of poor reception. Try above steps on checking and improving reception.
Q. The 1 or 2 key does not work when the intercom calls a phone.
A. Check if you can hear the relay clicking at the gate when the 1 or 2 key is pressed during a call. If
it can be heard, then the system is working, check wiring between the relay and the lock or gate panel.
If the relays do not make a clicking sound, then check this feature on a different mobile cell phone or
landline. If it works on a different phone, check the settings on the phone in question under DTMF
tones. Failure of DTMF tones to operate correctly is also a symptom of low reception. Check steps
above on improving reception. Try pressing the buttons longer when attempting to activate the gates
or door.
Specification
Model
AN1808-12M
4G Audio Intercom
Face plate
180 (H) x 109 (W) mm
Surface back box
189 (H) x 118 (W) x 65(D) mm
Length of antenna tail
3 meters cable
Power requirement
12~24V AC/ DC
Design and material
Vandal resistant / die cast aluminum
Humidity
Less than 80% RH
Operating Temperature
-20
℃
to 50
℃
Operating Current
Maximum 250 mA, Typically 55mA
E.&O.E.
.com.au
Frequenc
ies
700/850/900/
17
00/
1800/
2100
/
2300/
2600
MHz