The model 801P handset is included in the standard model 900 and VRK audio door entry systems (more than 10 buttons on the door entry panel) as well as the CS and CSP series of combined keypad and proximity door entry systems. The handset uses traditional wiring which is 4 common wires, plus a call wire. Features: It had a speech unit (which allowed the 'resident' to hear the 'guest/visitor', and I assume the other way as well, perhaps?). One of the most popular kits on the market, the Bell 901 kit features a high quality intercom panel manufactured from 3 mm anodised aluminium with a brushed finish. I've just bought a replacement handset (Bell 801) for my door entry system. The existing phone that I'm replacing has 5 wires going to different parts of the handset but their destinations are marked A B C etc. It appears to be an old "Entryphone" handset Can anyone help me to identify which wires go where (Z T 0 R 1) on the new handset? Please see the images which include the existing wiring (photo and diagram) at //www.diynot.com/network/DIYJunkie/albums/

However, upon installing it and trying to mimic the original wiring (from observing the original Intercom & speech module), it became clear that i needed more wires than i have (2 wires from each apartment) : ( The grill covering the speech unit does not compromise audio quality, and the speech unit is securely fixed to the rear of the plate, making for a great door entry system. Posting in this forum as my 'issue' is similar to the OP - and desperately hoping for a swift reply. My goal (if possible) is to simply replace the old 8-way Intercom system with a new unit, using the existing 8 internal handsets, using the existing wiring, and using the existing latch/door-release.The 'loop' system serves as a single cable supplying 4 apartments (4 apartments on the left side), and the same on the other (4 apartments on the right side).

The other coloured wires are present, but i now know that they feed the other apartments (see next point, Cabling). Bells (BSTL) 801 series handset is installed in thousands of installations in the UK, being one of the most popular handsets available.The wiring is a 'loop' system feeding the left & right side of the building. (2 cables, 1 for either side)