TELEPHONE No. 15

CBS TELEPHONE

Wooden wall intermediate telephone with switchable extension facility, used in CBS areas.  The phone can be secret or non-secret.

Ann  additional receiver can be fitted to the terminals shown middle, right.

The top cover of the body is a writing shelf and has a paper clip attached to it.

For one exchange line and one extension with inter-communication.  Used as the intermediate station.

Complete with a generator, induction coil. relay, two bridging coils, trembler bell and magneto bell.

Fitted with Transmitter No. 6 on early types and Transmitter No. 2 on later variants.  The transmitter arm moved up and down.

Two batteries were housed in the lower part of the telephone.

Superseded by Telephone No. 3 with Bellset No. 7.

Circuit diagram - N115.

Telephone includes (1928):-
1 x Bell No. 14, unmounted, or No. 9A.
1 x Bell No. 15A, unmounted (early type), or No. 16A, unmounted (later type).
1 x Coil, Induction No. 1.
2 x Cords, Instrument No. 110.
1 x Cord, Instrument No. 222.
1 x Generator No. 2A or No. 4C.
1 x Hook, Receiver F.
1 x Relay No. 3A.
1 x Switch, Intermediate.
1 x Transmitter No. 2. (Earlier pattern had Transmitter No. 6).
1 x Condenser, M. C. No. 14, fitted in later issues.
1 x Receiver, Bell No. 2 B for older type, or Receiver, Bell No. 1A for later types.

Frames, Notice, No. 2 and Labels No. 53, will not be maintained in these instruments.

Last revised: October 16, 2023