21CN UPDATE
Following the initial 21CN trials in the Cardiff area in 2007, the SSAIB has been informed that BT intends to migrate further PSTN lines in the Cardiff area over to the 21CN network during the period July 2008 to January 2009.
Although alarm system manufacturers have been doing extensive testing with BT it is proposed that alarm systems whose connections might be affected will be ‘groomed out’ of the migration process until all of the testing has been completed and the impact of 21CN on alarm transmission equipment is fully understood.
In order to facilitate this all installers with communicating alarm systems in then Cardiff area are being asked to provide details of communicating alarm systems in the migration area for which they are responsible.
If you install communicating alarm systems in the Cardiff area and have not already been contacted, with a specific request for this information, please contact the SSAIB office for detailed information on the migration and the action you need to take.
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