BT DIVERSE 1010 User Manual page 24

Connecting to PBX
Diverse system is only approved for use
with a compatible PBX including those
which do not provide secondary proceed
indication. If you would like a list of
suitable PBXs, contact BT on 154. If you
do have a compatible PBX it cannot be
guaranteed that the telephone will operate
correctly under all possible conditions of
connection. If you have any difficulties,
contact BT on 154.
Generally Diverse handset can be
connected to any PBX where a simple
modern telephone can be used to make
and receive calls. Diverse system is
suitable for connection to PBXs which
provide secondary proceed indication.
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