We have been asked to fit a audio only door entry system to a school where the gate is at the other end of the building from reception where the handset will be, approximately 100m away (no line of sight).

 

They have a network phone system which is being upgraded from analogue to digital shortly.

 

Is there a system that could connect to their phone system?

 

Or can you advise on the range of the wireless systems?

BPT have a new product out, and we are waiting on more details of that, but it is radio and depending on the numebr of walls it has to pass, would have the RF capability

you can either use something like this

http://www.securitywarehouse.co.uk/catalog/index.php?main_page=product_info&products_id=2241

 

that will connect to an analogue port on the pbx

 

there are ip / sip variations

I think this topic was discussed loads of time before at this forum