I know. Just pointing out that having it connected to the A & B incomers is not particularly beneficial - other than not having to remember to notify the alarm monitors before messing around with your internal cabling.

No, no filter required on a Redcare alarm.

Quick question, where is the redcare heartbeat generated from, is it the exchange end or the premesis? Just wondering if having the Redcare extension disconnected would prove anything?

Thought you did if the the line also has ADSL.

The exchange end, if there is no reply from the STU, an alarm is generated to say comms is down at the monitoring company.

I've been doing some testing today and have found the office line is indeed wired into the back of the master.

Now bear in mind the STU is disconnected from that socket at the moment.

I've plugged in the MCD directly into the test socket with the fax, and it still fails to handshake with the fax at the other end.

I've plugged a phone into the MCD and I can hear chirps, now depending on what controls the chirp response depends whether or not this is a problem...

Is it the exchange end that detects the off-hook state and suspends the chirps or is it the STU?

No.

The answer is actually - sometimes, depending on which Redcare is installed.

Ref:
http://www.redcare.bt.com/partner/broadband_compat.htm

There is no need for connection of an ADSL filter for both BT Redcare Classic and BT Redcare GSM. For BT Redcare Agile installations it is necessary for the connection of an ADSL filter on the secondary path.


Ref:
http://www.redcare.bt.com/security/installers/guide/...

(bottom of page 9 of manual)
If ADSL is being used on the line, make sure that the Titan unit is connected through a suitable ADSL filter (obtainable from BT Redcare).