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The Special Range Telephone portfolio gave Subscribers more choice in the types of apparatus available for rental. And as the UK market was opened up for competition, a combination of rental/single payment options was offered, leading ultimately to outright sale/ownership of the instrument. Originally, Special Range Telephones attracted an additional rental for a five year term, after which no extra charges were payable, but the phone was still the property of the Post Office. Exceptionally, renters could request the phone to be removed to different premises, when they moved home. |
In the early Eighties, three versions of STC's Deltaphone were added to British Telecom's "Special Range Telephones" portfolio.
The Special Range Telephone leaflet read...
"Combines the style of the Trimphone with the distinction of real leather. The new luxurious version of our popular lightweight telephone has all the special Trimphone features and can be installed as a main telephone or as an extension around the home."
The Deltaphone, manufactured by Standard Telephones & Cables Ltd., was installed and maintained by British Telecom.
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"Only those telephone instruments which have been provided by British Telecom are permitted to be connected to the Public Switched Telephone Network.
Call your local Telephone Sales Office for further details of the Deltaphones. The address and telephone number are shown in the preface of your Telephone Directory.
Please Note: We do our best to supply our customers with the apparatus they ask us for but we may have to provide apparatus which does not accord exactly with the descriptions and illustrations in this leaflet.
British TELECOM part of the Post Office PH 2523 (11/80) Printed by J.B. Litho Limited London."
Misc Details
In 1981, typical rental premium was £2.25 per quarter. Combined (bundled) line rental was £13.50 per quarter. VAT was 15%.
Telecom Instructions: B4 B0315, B3 N0001 and D7 C2231 refer.
Engineering Codes: Deltaphone SR1006A; Deltaphone Deluxe SR1016A
Special Range (SR) Telephones-Suffixes:
| Suffixes | Recall | Inbuilt Bell or Tone Caller |
| A | No | Yes |
| B | No | No |
| C | Yes | Yes |
| D | Yes | No |
| R | Earth Recall | |
| RR | Register Recall (Timed Break Recall) | |
| AR | AR Alternative Recall (Earth or TBR) |
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