[WXC/VFX] Does SPA2102 + VFX offer full duplexing?

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amigo

161 posts

Master Geek

#70672 28-Oct-2010 18:14

Hi,

Been on VFX for years, using SPA2102 adpator. Recently got a house alarm and have had a teething problems with a few false alarms - damn cat and earthquakes. The system rings me and I have to enter some numerical codes to shut down and reset the alarm etc.

Problem I'm having is that while the siren is screaming away on the other end of the line I am unable to get the system to respond to my numerical keypresses until the siren has finally timed out, then the system responds no problem. By then the neighbours are probably getting more and more upset with me.

I'm wondering if the alarm unit is fautly, or whether the siren screaming away is causing my VFX to only offer a one-way communication (like walkie talkie effect)?

I'm assumed that vfx might only have problems with alarms or devices that send modem/fax like communications, this system doesn't, it only uses analog numerical tones.

Anyone had any trouble with alarms and vfx?

Thanks

Zeon

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#396961 28-Oct-2010 18:42

Get an IP capable alarm with an Android/Iphone app?

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amigo

161 posts

Master Geek

#396965 28-Oct-2010 18:51

Zeon: Get an IP capable alarm with an Android/Iphone app?

Would need to get an Android/iPhone first! Then a whole new alarm.

Actually I'm thinking that I might just kill the internal siren. Currently it is centimetres away from the alarm control box, and blasts out 120db of screatching right into the microphone of the alarm controller, which sends that down to VFX line while trying to listen for my key tones. Maybe that is making the unit deaf. I know I would be. hehe

Niel

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#396967 28-Oct-2010 19:04

Move the siren.

You can never have enough Volvos!

Zeon

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#396970 28-Oct-2010 19:07

PM AlarmNZ. You may be able to get an IP card for your alarm which could maybe SMS you instead?

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richms

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#396971 28-Oct-2010 19:08

echo canceling seems to work on a "who is loudest gets herd" methodolgy, so perhaps try turning that off on the ATA (if you can on VFX) and see if it helps.

Richard rich.ms

sbiddle

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#396999 28-Oct-2010 20:10

Alarms and VoIP don't go necessarily go well together. There are two main alarm protocols - one is a low speed modem and the other uses high speed DTMF tones.

An IP alarm is the best way to go, but your only real options are with Alarm NZ as all the major monitoring companies are totally ignorant of the massive changes ahead.

amigo

161 posts

Master Geek

#397436 29-Oct-2010 16:45

The alarm dials numbers any number I specify directly. So it doesn't send anything digital, only a pre-recorded voice message and awaits for dial tones as a response, so I didn't think it would make any difference, provided that dial tones transmit OK over VOIP, which I know they do as you use them for voice accessing voice message menus, etc. Am I right?

I hope I'm right about the internal siren, have disconnected that out for now. Will test it over the weekend if the rain dries up as I'll get up on the roof to disconnect the external siren for a proper test and to fine-tune some sensors without driving the neighbors insane.