Approval Number: 5/l00D/3/D/022014

The Autodial No. 402 is a single number callmaker capable of storing and pulsing out a single customer-programmable number of up to 23 digits.  PABX access pauses of approximately 3 seconds may be entered whilst programming numbers by pressing the # button, each pause will reduce the stored number capacity by one digit.

The stored number is programmed by removing the lid of the unit and holding down the square white 'programming' button whilst keying in the number.  The number may be programmed with the Autodial 'on' or 'off Line'.

The number may then be pulsed out by lifting the handset of the associated telephone and pressing the 'call button' or the '#' button on the callmaker. The unit is intended for use in 'Harsh Environments' as defined in BS2011 and is housed in a case designed to prevent the ingress of dust or moisture.  A separate press button must be fitted to or near to the associated telephone to activate the callmaker once dial tone has been received.

The associated telephone may be fitted with a dummy dial to prevent unauthorised calls being made or may have a Dial Auto No. 28 FA (9 only Dial) to permit Emergency use. When used as an aid for the handicapped or other purposes, the associated telephone may be any standard PST instrument.

Made by Hosiden Besson Ltd.

Suitable for use on DELs or PABXs that respond to l0pps pulsing.  The Autodial No. 402 supersedes the Autodial No. 401A.  BT supplied and rented units used in AA or RAC roadside telephone boxes should be hard wired as Line Jack Units are not suitable for use in external environments.

The Autodial No. 402B is supplied with a 300mm spade ended line cord.


Item Name BT Item Code
Line jack Unit 10/7A (with cord) 374422
Autodial 402A, Grey 411169
Autodial 402B, Grey 870191
Line Jack Unit 10/7A (with cord) 374422

Click here for the wiring guide and additional information

Click here for the circuit diagram

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Last revised: February 10, 2022