SS91BV-M GSM Intercom
22
Revision E8
,Jan 2015
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 GSM 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 earthling 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 * or # key does not work when the intercom calls a phone.
A. Check if you can hear the relay clicking at the gate when the * or # 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.
