GSM intercoms

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GSM Intercoms (About)

Learn more about SimEntry GSM Intercoms...

SimEntry develop GSM intercoms and utilise popular call points from Manufacturers such as Videx, Entryphone London and SRS to provide a broad range of options and finishes to suit a variety of tastes and budgets.

In addition to the actual call point options, SimEntry offer 2 different GSM controllers with varied features to suit residential & commercial applications from basic to advanced.

SimEntry GSM Controller Options...

There are 2 different GSM controllers available with SimEntry GSM intercom kits.

a) G2 (default option) The G2 has the following features:

Supports GSM intercom call points with 1 or 2 call buttons
Can call up to 5 User phone numbers per call button
Timer delay between numbers called to avoid voicemail
SIM card cannot expire with auto-call feature or SIM card expiry alert by SMS
Low credit alert by SMS & SIM card credit check at anytime by SMS
200 User Caller ID access control
Unauthorised Caller alert by SMS including the Caller's number
Event log accessible by SMS as recent events or 1000 by optional PC software
Alarm input for SMS alerts
1 x gate / barrier / door release relay output
1 x auxiliary output for any function ie: part or pedestrian open or lighting
Configurable outputs for pulse, latch, timed or 1st call on 2nd call off
small size - fits inside existing control box

b) Z4 (optional) The Z4 has the following features:

Supports GSM intercom call points with 1 - 5 call buttons

Can call up to 10 User phone numbers per call button

Timer delay between numbers called to avoid voicemail

SIM card expiry alert by SMS

50 User Caller ID access control

4 x Alarm inputs for SMS alerts

Low credit alert by SMS & SIM card credit check at anytime by SMS

1 x gate / barrier / door release relay output

3 x auxiliary outputs for any other function ie: part or pedestrian open or lighting

Fully configurable outputs to allowing switching by pulse, latch, timed

Self contained weatherproof enclosure 180 x 140 x 80

Optional battery back up including mains fail / restore, battery level alerts by SMS

Free PC software for GSM controller setup, programing, system management

Learn more about GSM Intercoms...

What is a GSM Intercom?

It's a wireless intercom with no range restrictions. It contains a normal mobile phone SIM card and is programmed by SMS text message with preset phone numbers. It calls you on the phones of your choice as set, so when a Visitor press's the call button at your front door or gate it calls you. You answer the call as you would with any normal phone call and can open a gate, barrier or door from your phone keypad. With Caller ID on your phone, you will always know its the intercom calling.

Which SIM cards will it work with?

Any network on any type of plan. SimEntry supply a free PAYG SIM (UK Customers only) on Vodafone, 02 or T-Mobile (and soon Tesco Mobile, Orange & Lebara) however you can use any PAYG or contract SIM you like. The system will not work on 3G only SIM cards or SIM cards in parts of the USA which only offer 850Mhz. If you are in the USA, please check your local Network Operator offers the tri-band frequencies of 900, 1800 or 1900Mhz before purchasing.

What if I'm not available when the GSM intercom calls?

The system can be preset to call multiple numbers to be sure someone always answers. The G2 allows trip over to 5 numbers. The Z4 offers 10 numbers. The same number can be dialed multiple times ensuring your phone keeps ringing but it cuts off and tries again before voicemail picks up.

How much does it cost to use?

The average intercom call is around 20 seconds. Each call is just a few pence and you can limit the length of the call time call to prevent any extra charges. Many SIM cards have special offers when calling the same network so it's usually best to use the same SIM as you usual phone. If you check the SIM card offers before you choose, you may even get free or cheap calls to some numbers if they are on the same network. For example, Tesco Mobile (uses the 02 UK network) offers half price calls (10p / min) to 5 favourite numbers. You can limit the intercom call time so you know the call won't cost more than 1 minute.

Why is it better than a traditional wired or radio based wireless intercom?

There are no communication distance restrictions with a GSM intercom. You are not restricted to answering intercom calls at the front door or on a fixed kitchen handset. As the GSM Intercom calls normal telephones, you can use all of your existing land line telephones as intercom points - and better still, if you're not home, it can call your mobile wherever you are. As the system is mobile phone based, you can also receive SMS alerts to notify you of various events, such as your gate being left open or mains power fail.

If your questions haven't been answered, please contact us and we'll update this list for the benefit of others.