Fixed GSM Gateway for Alarm Dialler Application

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dimsim

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#133437 22-Oct-2013 14:01

as above, looking to kick telecom landline into touch so want to have alarm dialling via gsm. suspect this device should be capable of t.38 faxing and it should work.

I did have an ericsson w35 which follisly I sold a little while ago... I'd imagine that would hav edone the trick fine, but have no need for the whole 3g broadband router and wireless thing. just need a pure gsm voice gateway to connect my pots alarm dialler.

does anyone have any suggestions?

thanks

johnr

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#919706 22-Oct-2013 14:13

What about a GPRS modem?

coffeebaron

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#919712 22-Oct-2013 14:35

You will need circuit switched data number, unless this is just dialling out as a voice call to e.g. your mobile.

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sbiddle

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#919729 22-Oct-2013 14:58

T.38 is a VoIP protocol for fax. It has nothing to do with GSM.

You need to determine if you're after something that does regular circuit switch voice (common alarm protocols such as ContactID) or something that requires circuit switched data (some modems). If you need circuit switched data you'll need to have this enabled by Vodafone. I'm not sure what their current pricing is for this.

If you're just after a regular GSM voice gateway I have a couple of spare Ericsson ones lying around. If you're interested let me know how much you want to pay. No reasonable offers refused!

johnr

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#919757 22-Oct-2013 15:34

CSD outbound is active on all connections by default but only postpay connections can have a inbound terminating CSD MSISDN

sbiddle

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#919802 22-Oct-2013 17:06

How is CSD priced now?

Zeon

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#919806 22-Oct-2013 17:19

Might be easier just to get the 3g router on some really cheap prepay plan or something with an IP module on the alarm.

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gregmcc

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#919840 22-Oct-2013 18:30

Funny thing just done that exact same thing to my home alarm, I don't know what brand of alarm you have, but I have an arrowhart alarm products (Crow/Elite series), I got a 2G -IP module, it connects directly to the POTS port on the alarm and is powered from the alarm, works great, sends either emails or txt's depending on the alarm type, just need to put a sim in with some data and you are away.

There are IP modules avaliable which can email via your internet connection.

The 1st step would be to figure out what kind of alram you have, there other option, you can buy a generic module which uses an output from you alarm and it will text a preset number with a preset message.

dimsim

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#920076 23-Oct-2013 07:16

sbiddle: T.38 is a VoIP protocol for fax. It has nothing to do with GSM.

You need to determine if you're after something that does regular circuit switch voice (common alarm protocols such as ContactID) or something that requires circuit switched data (some modems). If you need circuit switched data you'll need to have this enabled by Vodafone. I'm not sure what their current pricing is for this.

If you're just after a regular GSM voice gateway I have a couple of spare Ericsson ones lying around. If you're interested let me know how much you want to pay. No reasonable offers refused!

o.. I though the alarm dialler used fax tones to communicate with the alarm company so if the device was t38 capable I would have no problems.

I did hook up to a WxC provisioned Linksys spa3012 but the alarm company never received any communication. The dialler used to simply call our cellphones and say something like "alarm activation at <address> which was pre-programmed by the alarm people but I switched to full monitoring years ago.

Is a GSM voice gateway something you can use a POTS phone with to talk over GSM? If so sure, would be great to give one of those a try.

dimsim

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#920077 23-Oct-2013 07:19

gregmcc: Funny thing just done that exact same thing to my home alarm, I don't know what brand of alarm you have, but I have an arrowhart alarm products (Crow/Elite series), I got a 2G -IP module, it connects directly to the POTS port on the alarm and is powered from the alarm, works great, sends either emails or txt's depending on the alarm type, just need to put a sim in with some data and you are away.

There are IP modules avaliable which can email via your internet connection.

The 1st step would be to figure out what kind of alram you have, there other option, you can buy a generic module which uses an output from you alarm and it will text a preset number with a preset message.

I think the alarm uses tones to communicate with the monitoring company... I will check with them to see if they can receive txts though. I do have an internet connection so could go down the ip dialler route but wanted to have something more independent like GSM.

sbiddle

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#920079 23-Oct-2013 07:29

dimsim:
sbiddle: T.38 is a VoIP protocol for fax. It has nothing to do with GSM.

You need to determine if you're after something that does regular circuit switch voice (common alarm protocols such as ContactID) or something that requires circuit switched data (some modems). If you need circuit switched data you'll need to have this enabled by Vodafone. I'm not sure what their current pricing is for this.

If you're just after a regular GSM voice gateway I have a couple of spare Ericsson ones lying around. If you're interested let me know how much you want to pay. No reasonable offers refused!

o.. I though the alarm dialler used fax tones to communicate with the alarm company so if the device was t38 capable I would have no problems.

I did hook up to a WxC provisioned Linksys spa3012 but the alarm company never received any communication. The dialler used to simply call our cellphones and say something like "alarm activation at <address> which was pre-programmed by the alarm people but I switched to full monitoring years ago.

Is a GSM voice gateway something you can use a POTS phone with to talk over GSM? If so sure, would be great to give one of those a try.

Alarms and faxing have nothing to do with each other. T.38 is a fax protocol. It is not used (and can't be used) for any other low speed data devices.

The most commonly used alarm protocol is ContactID which used DTMF tones to communicate. There are also a number of different other alarm protocols used for higher spec systems with more zones that use a modem to communicate. As carrying DTMF inband over VoIP introduces lots of potential issues it's carried out of band, and most ATA's will struggle to accurately decode DTMF tones at the speed the ContactID protocol uses. This is why you should never contemplate running an alarm over VoIP - even if it works it's a 98% best effort solution which is simply not good enough.

I can appreciate you're trying to do things on the cheap but if you want a reliable system you really need to be asking your alarm company for advice.

dimsim

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#920094 23-Oct-2013 08:03

sbiddle:
dimsim:
sbiddle: T.38 is a VoIP protocol for fax. It has nothing to do with GSM.

You need to determine if you're after something that does regular circuit switch voice (common alarm protocols such as ContactID) or something that requires circuit switched data (some modems). If you need circuit switched data you'll need to have this enabled by Vodafone. I'm not sure what their current pricing is for this.

If you're just after a regular GSM voice gateway I have a couple of spare Ericsson ones lying around. If you're interested let me know how much you want to pay. No reasonable offers refused!

o.. I though the alarm dialler used fax tones to communicate with the alarm company so if the device was t38 capable I would have no problems.

I did hook up to a WxC provisioned Linksys spa3012 but the alarm company never received any communication. The dialler used to simply call our cellphones and say something like "alarm activation at <address> which was pre-programmed by the alarm people but I switched to full monitoring years ago.

Is a GSM voice gateway something you can use a POTS phone with to talk over GSM? If so sure, would be great to give one of those a try.

Alarms and faxing have nothing to do with each other. T.38 is a fax protocol. It is not used (and can't be used) for any other low speed data devices.

The most commonly used alarm protocol is ContactID which used DTMF tones to communicate. There are also a number of different other alarm protocols used for higher spec systems with more zones that use a modem to communicate. As carrying DTMF inband over VoIP introduces lots of potential issues it's carried out of band, and most ATA's will struggle to accurately decode DTMF tones at the speed the ContactID protocol uses. This is why you should never contemplate running an alarm over VoIP - even if it works it's a 98% best effort solution which is simply not good enough.

I can appreciate you're trying to do things on the cheap but if you want a reliable system you really need to be asking your alarm company for advice.

that's the problem, last time we got burgled the monitoring company took 15minutes to call me, by which stage I was 17 minutes away from home. after complaining they simply apologised and implied I could go elsewhere if not happy. in short id rather not deal with them, just sort another suitable method to allow the alarm to dial them.
The alarm would have been installed around 2000. upon activation it dials the alarm company and communicates certain things, activation, which zone(s) have been activated, if the alarm has reset, how long each zone was active for etc
I live rurally so any reputable alarm company will do they same job as they all will have the approximate same time to actually respond onsite to a call out given our distance from town.

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timmmay

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#920101 23-Oct-2013 08:28

When I had my alarm installed a 3G data connection was a $200 add on. Any alarm company can do it for you, probably cheaper than DIY if you value your time.

dimsim

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#920102 23-Oct-2013 08:31

timmmay: When I had my alarm installed a 3G data connection was a $200 add on. Any alarm company can do it for you, probably cheaper than DIY if you value your time.

sure - depends on your alarm, there are plenty of cheap wireless/gsm alarms around. id rather not replace the alarm as it works perfectly, just want to lose the landline. I will ask them though although Ill guess the answer is get a new alarm... hopefully ill be pleasantly surprised.

timmmay

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#920104 23-Oct-2013 08:36

I mean you can add a 3G data connection to your existing alarm. It's just whether you get a cheap one from ebay or get a company here to do it. If it's monitored then talk to the monitoring company.