HC Deb 14 February 1966 vol 724 c173W
Mr. Stratton Mills

asked the Postmaster-General what proportion of subscriber trunk dialling calls from Belfast during 1965 was not received; and if he will tabulate the reasons.

Mr. Benn

The information requested by the hon. Member is as follows:

STD calls from Belfast failing due to
(a) (b) (c) (d) (e)
Dialling Errors by Calling Customer Plan Defects Engaged Tone from all causes* No Reply by Called Customer Total
per cent. per cent. per cent. per cent. per cent.
5.7 4.1 20.1 5.8 35.7
* Combines engaged tone due to called customer engaged and to trunk lines engaged. Arrangements are being made to give separate indications of these two conditions, but until the necessary equipment alterations have been made it will not be practicable to give a reliable statistic for each condition separately.