B MARKETING COMMERCIAL
4 Facilities and Apparatus
Issue 1, Jan 1980
SPECIAL RANGE TELEPHONE (SRT)
Deltaphone and Deltaphone Deluxe by STC
This instruction deals with the physical description, field of use, title and identification of the telephone.
The Deltaphone and Deltaphone Deluxe are respectively standard Post Office rotary dial and
push button Trimphones, with the main body of the telephones and the back of the handsets covered with genuine leather. The leather
covering cannot be removed. The Deltaphone will be available in Brown leather only, and the Deltaphone Deluxe in Red and Green leather versions. Each telephone is supplied fitted with a
five way line cord, three metres long when fully extended, terminated with a Plug
No. 505. Alternative cords cannot be provided. These telephones use standard telephone number labels.
Height 109 mm, Width 246 mm, Depth 220 mm and Weight 810 gm.
FIELD OF USE
Type A: Exclusive and shared exchange lines; PBX extensions without recall facility;
and main stations and extensions of Plans 1A and 4 including Plan 4 off 1A.
IDENTIFICATION AND TITLE
The marketing titles are Deltaphone by STC and Deltaphone Deluxe by STC. These titles will be used in all advertising and publicity material), for the telephone and in contacts with the general public. The
PO engineering titles are Telephone No. SR1006A for the Deltaphone and Telephone
No. SR1016A for Deltaphone Deluxe. Post Office ownership can be confirmed against the appearance of this number, the year of manufacture, and the words ‘Post Office
Property’ which are marked on the base.
Another ill-fated attempt to
give the Trimphone another lease of life came when some bright spark had the
idea of cladding the telephones in leather. The cases discoloured rapidly from
finger grease and other contaminations but this did not deter the Post Office
from including these unfortunate instruments in their Special Range in 1980
under the Deltaphone name.
by STC, the Deltaphone was just a leather covered Trimphone, with a Plug No.
505. This plug was inserted into the jack socket and was then covered with a small sheaf, which was supposed to stop
the plug being removed from the socket.
DELTAPHONE with dial, mid-brown (see above).
DELTAPHONE DELUXE with push button keypad. Red, green.
As SR 1006A but with PST line cord.
8016A As SR 1016A but with PST line
More information on Telephones Special Range
Special Range Telephone Suffix's
A = NO RECALL, CALLING DEVICE
B = NO RECALL, NO CALLING DEVICE
C = RECALL, CALLING DEVICE
D = RECALL, NO CALLING DEVICE
G = MF DIALLING