Technical information
Technical information
Connection information
Your BIG Button phone
may be connected to public networks in the United Kingdom.
It may also be connected to switching systems that use tone (MF) signalling, with timed break or earth recall. If in doubt, your switch supplier or maintainer should be able to offer help. Advice on connection to BT switching systems can be obtained by dialling BT Freefone 0800 800 152.
Generally your BIG Button phone can be connected to any switchboard where a simple modern telephone can be used to make and receive calls.
How many phones
can you have?
All items of telephone equipment have a Ringer Equivalence Number (REN), which is used to calculate the number of items that may be connected to any one telephone line. Your BIG Button phone has a REN of 1.5. A total REN of 4 is allowed from a single telephone line. If the total REN of 4 is exceeded, the telephones may not ring. With different telephone types there is no guarantee of ringing, even when the REN is less than 4. Typically 2 or 3 phones can be working simultaneously on the one telephone line.
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