Thread: Security Alarms and VOIP
View Single Post
Old 16-02-2007, 10:59   #1
Stuart
-
 
Stuart's Avatar
 
Join Date: Jun 2003
Location: Somewhere
Services: Virgin for TV and Internet, BT for phone
Posts: 26,546
Stuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver bling
Stuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver blingStuart has a lot of silver bling
Security Alarms and VOIP
Just a heads up for those of you who are considering getting a VOIP phone, and have or may get a home alarm.

Apparently, your home alarm may not work reliably (if at all) with VOIP.

There are currently three problems with using alarms over VOIP
  1. A lot of VOIP systems block 999 calls.
  2. VOIP requires a continuous electrical supply. If something has happened that sets the alarm off, that something may also disable mains power. Landlines use power provided by the network.
  3. VOIP is highly compressed. This compression is usually achieved by removing tones beyond the range of human hearing, such as a lot of the tones used by modems, including those used in security systems.

All from: http://www.networkworld.com/community/?q=node/11523
Stuart is offline   Reply With Quote