3 Internal
M 0035

Description and Installation

This instruction describes and details the installation of the Autodial No. 101A (Key Callmaker), which enables subscribers connected to Automatic exchanges or PABXs (not PABX 5 or 6) to call other frequently used numbers without the necessity of remembering or dialling the telephone number. To call other subscribers and in the event of mains failure, the normal telephone dial may be used. The Autodial cannot be used on shared service lines and House Exchange Systems and is not recommended for use on PMBXs.

The Autodial is a repertory dialer, giving a capacity of sixteen digits per address and thirty-two addresses. The operation of an address button allows a predetermined telephone number to be transmitted to line in the form of 10 pps loop/disconnect pulses. A simple amplifier and loudspeaker is provided to monitor the progress of calls and the handset of the associated telephone need only be lifted for conversation when the call has matured.

The addresses are stored on a translation field by means of wire connectors.

The items which comprise an Autodial No. 101A are a Key Unit No. 1A, a Translator No. 1A, a Power Unit No. 86A, a Box Connexion No. 6A, 200 Connectors No. 1001A, an Insertion Tag No. 1 and an Extractor No. 11.

The Key Unit No. 1A is a desk unit measuring 9 inches x 7.5 inches x 3.5 inches, and houses the thirty-two address buttons, a cancel button, an ON-OFF switch, a miniature loudspeaker, and two lamps, which indicate when the dialer is in use and when the power is on. The address buttons are arranged in four columns of eight and each button is provided with a paper designation label protected by a transparent plastic cap. When a button is operated it remains locked down while the autodial is controlling the call.

The Translator No. 1A is a wall-mounted unit measuring 18 inches x 9.5 inches x 4 inches and houses the autodial circuitry and the translation field. (Figure 2). It is connected to the Key Unit, via a Box Connexion No. 6A, by a 41-wire cable. The power unit and the line are connected to the translator by two one-pair cables. The telephone is connected to it by a three-wire cable.

The Power Unit No 86A is a wall mounted unit measuring 8 inches x 5.5 inches x 3.5 inches. It is mains operated and gives an approximate off-load DC voltage of 18 volts.

The Connectors No. 1001A are tag ended wires used for address programming and are supplied in four colours in units of 25.

The following items should be requisitioned:-

Translator No. 1A
Key Unit No. 1A
Power Unit No. 86A
Inserter Tag No. 1
Extractor No. 11
Connectors 1001A (Red)
Connectors 1001A (Blue)
Connectors 1001A (White)
Connectors 1001A (Green)
Box Connexion No. 6A
Cable PVC No. 1 41W/6.5 lb as required
Cable PVC No. 1 4W/6.5 lb as required

A three-pin mains plug to suit the socket outlet provided by the subscriber and a 3-core mains cable should also be obtained.

Location and Mounting
The Box Connexion No. 6A should be mounted such that, when the Connector No. 1046A is joined to it, the cord leads out naturally and allows the key unit to be positioned adjacent to the telephone. The Translator No. 1A should be wall mounted, in an upright position, at a comfortable working height and In a well-lit situation agreed by the subscriber and within a 30-yard cable run of the key unit. Cable runs of up to 60 yards may be used provided the subscriber Is satisfied that the level of reproduction in the monitor amplifier loudspeaker Is acceptable. Round Head No. 6 wood screws at least 1 inch long should be used for mounting the translator.

The power unit should be mounted close to the translator. The DC output can be connected to the translator or the box connexion as convenient.

Connexion Details
To gain access to the terminals In the translator once the lid has been opened, the four screws from the extreme corners of the unit should be unscrewed allowing the terminal cover to be removed. Cables entering the translator should be clamped in position with the clamp provided.

  1. Power Unit Connexions. Check that the mains-transformer input is strapped correctly for the local mains supply. Connect the power unit as shown In diagram N2310.

  2. Direct Exchange Line Connexions. The Autodial should be connected as shown on diagram N2310.

  3. Connexion to PABX Extension. The Autodial should be connected as shown on diagram N2310 with the exception that the green conductor In the telephone cord should be transferred from the box connexion terminal 50 to box connexion terminal 48. The PABX recall earth should be connected to box connexion terminal 48 and the telephone wired according to Diagram N 806 panel 4.

  4. Connexion to Single Line Extension Plans. The Autodial should be connected directly to the exchange line as follows:-

    Disconnect the line pair from the extension-plan terminal block and connect it to the box connexion terminals 54 and 56 as shown on diagram N2310. The telephone shown on diagram N 2310 is not required and the box connexion terminals 50 and 52 should be connected to the terminals on the extension plan terminal block from which the line pair was removed.

    The selected telephone of the extension plan may now be used with the Autodial. Other connexions should be made according to diagram N2310.
    If sufficient spare terminals exist in the box connexion all the extension-plan wiring should be transferred to these terminals allowing the original terminal block to be recovered. When this is done a local record should be made to assist subsequent maintenance activities.

    It should be noted that in the case of a Plan 105 or Plan 107 the Autodial may be connected at the extension to the incoming pair to the telephone as if it were the line pair, according to the above principles.

  5. Connexion to Extension Plans with more than one Line. The Autodial can only be connected to one selected exchange line and should be connected according to the wiring principles described in paragraph (d) above.

Translator Permanent Straps
Two rows of tags in the top left hand corner of the lower circuit board of the translator are accessible when the terminal cover is removed. The tags should be checked that they are strapped as shown on diagram N2310. The 'LEVEL' tag is normally strapped to the "DIGIT 91 tag thus allowing an access digit 191 followed by a long inter-digital pause to be transmitted when required at PABXS. Should the access digit required be of a value other than 191 then the strap should be moved to the appropriate digit digit tag.

The 'XCH LINK' renders the access digit preceding the ISD code ineffective and should only be removed when the Autodial is connected to a PABX extension.

Address Connexions
The translation field has thirty-two groups of thirteen tags. One tag Is labelled "Access' and the remainder are numbered 1 to 12. There are fourteen slotted bars between the tag groups, representing digits 1 to 0, EXCH, ISD, STOP and one spare bar. The appropriate tags of each address should be connected to the digit bars by use of Connectors No. 1001A. The connector tag should be located in the end of the Inserter Tag No. 1, with the connector wire laying in the groove in the shank of the tool. The tag can then be pressed onto the appropriate address tag. This process should be repeated with the other end of the connector so that it is located horizontally in a slot on the required digit bar.

Should it be necessary to remove a connector, the Extractor No. 11 should be hooked into that part of the tag immediately below the crimp and gently pulled off the terminal. The connectors are sup- plied in four colours for ease of Identification. Each address should be wired using connectors of the same colour and adjacent addresses using connectors of different colours.

  1. Autodials connected to a direct exchange line. To store a telephone number on the translation field, tag 1 of the chosen address is connected to the digit bar corresponding to the first digit of the telephone number, tag 2 is connected to the digit bar corresponding to the second digit and so on. When the last digit has been connected the next free tag is connected to the STOP bar.

  2. Public Network calls from a PABX. When public network calls are required from a PABX extension, a public exchange access digit is required, normally 9. By dialling this number access is provided to the public network, and, on receipt of dial tone, the remainder of the number is dialled. By connecting the ACCESS tag of an address to the EXCH bar the Autodial is programmed to dial 9, apply a two-second Inter-digital pause (to allow for the receipt of public exchange dial tone) and then transmit the national number.

  3. ISD telephone numbers. When an international number is required the ISD (International Subscriber Dialling) code 010 is set up by connecting the appropriate ACCESS tag to the ISD bar, the remainder of the number being connected as in para a above. If the ISD number is required from a PABX extension, the permanent straps cause the digit 9 and a long interdigital pause to be transmitted before the 010.

  4. Local PABX numbers. The translation field is wired as for a direct exchange line and the ACCESS tag is left spare.

  5. Spare addresses. These should be left unconnected.

Labelling of Key Unit Buttons
The name should be written (or typed) on the centre portion of the label and the number may be written on the side section. The label is held captive by the transparent button top. To gain access to the label the transparent top should be gripped by its longer sides and gently pulled off the button.

Testing and Operation
Connect a test number to an address in the translator. Ensure that the power supply and the ON/OFF switch on the Key Unit are both ON. The left-hand lamp on the Key Unit should now glow.

Check the telephone instrument can be used in the normal manner.
Operate the appropriate address button and check the following:-

  1. Ensure the address button locks down.

  2. The right hand lamp on the Key Unit glows.

  3. When pulsing has ceased the supervisory tones should be heard on the monitor amplifier loudspeaker. (To adjust the level see para g).

  4. When the handset of the telephone is lifted, the address button should release, the right hand lamp cease to glow and the monitor amplifier should be disconnected. Conversation may now proceed.

    Replace the handset and check the cancel button as follows:-

  5. (e) Re-operate the address button and ensure that, when the cancel button is operated, the Autodial releases.

    To check the time-out circuit proceed as follows:-

  6. Repeat (a), (b) and (c).

  7. Wait for approximately 60 seconds after the end of dialling without lifting the telephone handset. The call should then automatically release. When the checks have been made remove the test number and connect the addresses required by the subscriber.

It should be noted that when the autodial is connected to an extension plan and a call has been originated by the autodial, the lifting of an extension telephone handset will cause the autodial to release.

Monitor Amplifier Volume Control
It should be ensured during testing that the signals in the monitor amplifier loudspeaker are at a satisfactory level for the subscriber. If necessary the level may be adjusted by a variable resistor (RV7) situated in the translator on the lower printed circuit board below terminals 35 and 36. When the volume has been adjusted to a satisfactory level the translator terminal cover must be replaced.

Wiring details are shown in Diagram N 2310.

Diagram SA 9199 shows the circuitry of the Autodial and Diagram Notes SA 9199 explain the circuit operation.


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Last revised: December 31, 2022