COIN TELEPHONE No. 24

SELF CONTAINED COIN TELEPHONES
Coin Telephone No. 24A & Cash Compartment No. 5A (Trial Model)

1 CONTENTS

1 CONTENTS
2 INTRODUCTION
3 GENERAL
4 PRE-INSTALLATION INSPECTION
5 TESTER 297A

2 INTRODUCTION
This instruction details the installation of the Coin Telephone No. 24A (CT24A), commercially known as the 'Blue Payphone 2', and functional tests to be applied prior to handing over the equipment for service.

3 GENERAL
The CT24A is a self contained micro-processor controlled, line powered, prepayment telephone. It is intended as the standard replacement for Pay-On-Answer (POA) type coinboxes. It offers facilities to enable users to originate IDD, STD and Local Calls and accepts 2p, 5p, 10p, 20p, 50p and £1 coins. Full operator access is also available.

The telephone case is of stainless/mild steel construction and is divided into two compartments. The top compartment houses the mechanism and electronic circuits. The lower compartment contains a cash container and is connected to the mechanism compartment via a metal coin tube.

The payphone will be delivered to site in two boxes, one containing the Coin Telephone No. 24A and the other containing the Compartment Cash No. 5A.

The Coin Telephone No. 24A will be fully equipped with the exception of: -

(a) Lock No. 3/42...... The cam for this lock will be found packed with the Coin Telephone No. 24A.

(b) Battery Secondary No. 35.

(c) Telephone Number label. The Compartment Cash No. 5A will be complete except for the items detailed below.

• Lock No 59A The cam for this lock will be packed with the Compartment Cash No. 5A.

• Container Cash No. 12 with Lock No. 60...... A representative of the Call Office Accounts Group will insert the cash container into the cash compartment and lock the compartment door when the installation of the CT24A is completed.

4 PRE-INSTALLATION INSPECTION
At the CCB Installation or Maintenance Repair Centre, each CT24A should be carefully unpacked and a check made for any discrepancy and/or damage. It is advisable prior to installation to ensure that the CT24A operates successfully. The connection of an ORD exchange line with Subscribers Private Meter SPM supply and a signalling earth to the CT24A will enable the coin telephone to be tested in accordance with para 12 of this instruction.

A check should be made to see that the security rivets are fitted to the earpiece and mouthpiece of the handset. If the rivets are missing, they should be fitted in accordance with TI E5 C0706.

Fit the Mechanism Compartment Lock.
Fit telephone number label.
Fit battery.

5 TESTER 297A

The CT24A requires certain information to be preset in a non-volatile memory. This work should be carried out at the CCB/Installation Repair centre after the pre-installation check. Ensure that the battery is not disconnected after the information has been set into the CT24A.

The Tester 297A is the means by which this information is preset in the CT24A. The Tester 297A is a hand held programming key pad that is plugged into the payphone.

The information required by the CT24A is divided into two sections: -

• Fixed Information.

• Variable Information.

Fixed Information
This consists of information about Tariffs and Service Codes i.e. operator free services. All this information is stored in an EPROM that is contained within the Tester 297A.

Variable Information
This consists of the various telephone numbers to which automatic fault and other reports are to be sent and the coin telephone identity number. There are five possible telephone numbers: -

(a) cash container 75% full reporting number,

(b) cash container contents reporting number,

(c) alarm reporting number,

(d) coin telephone identity number,

(e) fault reporting number.

These telephone numbers will have to be keyed into the CT24A using the keypad of the Tester 297A.

If no reporting number is required ensure a null is inserted.

Paragraphs 6 - 11 have been missed as they are not relevant to this document.

Last revised: June 15, 2023