TRIMPHONE Sales Circular

DF 280
Circular 121/68

29th March, 1968


1. Marketing Policy
A&PRD Circular 342/65 introduced Trimphone in several selected Areas some of which were asked to stimulate sales. The present level of supplies and estimated size of the market now enables spontaneous orders to be accepted. nationally and, the active campaign ho ha extended to all areas in LTR (London Telephone Region).  Stimulated selling will also continue in Wales and. Border Counties and. Northern Ireland.

2. Description
The Trimphone is a light weight table instrument weighing only 2lbs, It is 8,25" long, 4.25" wide and 4.25" high.
Colours are as follows:

Telephone Base  Handset
Two-tone blue Light blue  Dark blue
Grey/Green Mid/Grey  Olive green
Off-White Off-white Light grey

In place of the conventional bell the Trimphone has a tone caller, a built-in electronic device which produces a high  pitched intermittent warbling note, The tone caller has a three position switch which allows the tone to be varied from soft to loud. In the build-up position (marked >) the tone starts quietly and. builds up to loud in about 10 seconds. Where required the switch can be arrange to provide an “off” position f or plan arrangements etc. The dial has a transparent finger plate with letters and figures beneath the finger holes and is permanently illuminated from within by a self energised fluorescent tube which does not require a power supply. The level of illumination is adequate to make the dial easily visible in a darkened room. Other features of the Trimphone are its lightweight handset which rests over the dial, the handset rest which forms a carrying handle, and the instrument cord which extends from 4' 6” to 9’. A photograph of the instrument is at Appendix the design and colours have been approved by the Council of Industrial Design.

3. Facilities
Trimphone can be fitted at most locations where Telephone 706 is suitable. There are exceptions to this rule, and Sales staff should make themselves familiar with the schedule of limitations shown at Appendix B.

Current supplies of Trimphone include the earlier model (Telephone 712) in Blue and Grey,/Green. Supplies of the later model (Telephone 722) are now available in all three colours and local EDs will use the residual stocks of Telephone 712 for single telephone applications only.

Attention is drawn to the footnotes at Appendix B which outline further restrictions in the application of Trimphone due to temporary delays in introducing support items.

4. Tariffs and Insurance
4.1 Modern telephone charge - £1. For the purpose of this charge the Trimphone should he regarded as a modern telephone, the charge to be applied on the sane basis as for any other modern telephone in TpS1 BI V. If a Trimphone is ceased, it may be replaced by a modern table or wall type without modern or change of apparatus charge,

4.2 Quarterly rental - 7s. 6d.. This rental is in addition to any other standard charges payable for the installation,

4.3 Minimum term - One year.

4.4 Change of apparatus charge - as in TpSI B5 IV 9 -12.

4.5 Removal charges - as in TpSI B5 IV 5.3 and 6.

4.6 Insurance Value - £20.

5. Supply
Instructions on requisitioning supplies of Trimphone for Section Stock holdings have been issued to RSCO/ASCOs.

6. Publicity
A promotional leaflet PH 1089 and cord PH 1089(a) are available from SupD on normal requisition. An initial issue will he made to all Areas not actively selling, and Areas are asked to keep the quantities ordered subsequently within reasonable limits.

7. Record of sales
All Areas, whether actively selling or only accepting spontaneous orders, should forward a monthly return of the
total number of Trimphones ordered to D/TRs (Sales Branch) in the first week of each month completed up to the last working day of the previous month. This instruction simplifies the form of return at present being submitted by Areas actively selling. The number of offers made and the colour breakdown of Trimphones sold are no longer required.

8. Any enquiries about this circular should be made via D/TRs to THQ/MD/M2.1/C, Mr. W. H. Withycombe, 01 432 4565.

9. This circular cancels THQ/M2. 2/C Telex dated 5th January 1968 and should itself be cancelled when the relative amendments to TpSI BI, B5 and H20 are received, or on 29th March 1970, whichever is the earlier.

TD/MH/2 69

BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: April 08, 2010