Nortel Meridian 1 Planning And Installation Manual page 570

Appendix D – Preprogrammed data for the United Kingdom Page 549 of 590
Analog telephone model set 35 (Hotel only)
Model 35 is a guest room telephone with unrestricted outgoing access. It can
receive incoming calls from standard exchange lines and DDI lines.
The telephone receives message waiting indication through interrupted dial
tone and a visual indicator on the telephone. The telephone's outgoing access
can be controlled when the room is not occupied or is being cleaned. Cost
details can be added to to the telephone with the appropriate equipment.
Option 11C Mini Planning and Installation Guide