Autodialler Handbook HK1110 issue 2
Adds pressbutton facilities to a standard dial telephone.
Adds a repertory memory store - 10 numbers with up to 18 digits each.
Adds a 'try again' facility.
This simple to install free-standing add-on unit brings important
improvements to the ordinary rotary dial telephone.
1. It replaces rotary dialling by pressbutton signalling, thereby
simplifying operation and improving accuracy.
2. It has a 'memory' which can be programmed by means of the keys on the
unit. This programming requires no technical knowledge.
3. The 'memory' can be programmed with 10 numbers each having up to 18
digits. These numbers may then be 'called' by pressing only two buttons.
4. Another important feature of this remarkable equipment is the 'try
again' facility. It always remembers the last number manually keyed, even if
the handset has been replaced for an indefinite period, and even if 'stored
number' calls are made in the meantime. Therefore, if a number is engaged
when first called, it can be tried again any number of times by operating
one button instead of complete re-dialling each time. This number remains
available until it is replaced by manually keying a further number.
5. No internal alterations are necessary to the existing telephone
instrument, and the unit can be used with any type of standard dial
The 'SpheriCall' is based on MOS-LSI (metal oxide silicone/large scale
integrated) circuits, a field in which Pye TMC are particularly experienced,
having been the first in the world to apply this technology to telephone
NOTE: When used with a PABX extension the exchange access digit can be
pie-recorded for use with the repertory dialling and 'try-again 'facilities.
Dimensions / Weight
Height - 101 mm.
Diameter - 135 mm.
Weight - 1.9 kg.
Pye TMC Stock No. S543777
The 'SpheriCall will operate with the following telephone system conditions
- Exchange battery voltage (Nominal) 24V, 48/50V, 60V.
The 'SpheriCall' is powered by two six-cell, 150 mA hr, nickel cadmium
batteries. These may be charged from 50V or 60V telephone lines, where a
bleed current of 3 mA is permissible, or from a mains power supply unit
which can be supplied on request.
Period of store sanctity in event of mains failure (battery fully
charged) is 60 hours minimum.
Protection has been provided against the effect of large voltage surges
occurring on the line.
Handset Position Detector
The unit will not function until the telephone handset has been lifted from
the cradle. The on or off-cradle position of the handset is detected by a
voltage discriminator connected to the incoming exchange pair. It presents
the following input resistance conditions to line - 24V systems = 600k ohms
min and 50/60V = 3M ohms min.
Max. Rate of input keying - 15 digits/sec.
Pulsing speed - 10 or 20 pulses per sec.
Pulse mark/space ratio - 1.6:1 or 2 : 1 break ratio.
Ratio distortion of output pulses - less than 2 mS.
Interdigital pause (l.D.P.) - 10 P.P.S. = 850 ±50 ms. and 20 p.p.s. = 425
Initial transmission delay = 1 I.D.P.
Pulsing contact - Hermetically sealed, m e r c u r y wetted relay contact,
with spark quench circuit of 100 ohms in series with 2.2 MFD.
Dial off normal - Hermetically sealed, dry reed, relay contact.
Connection to line
A junction box can be supplied on request to provide connections to the
telephone line. Where mains power is necessary a special junction box
incorporating the power unit is available.
The case of the auto dialler is moulded in plastics and fitted with a
non-slip base. The keypad is mounted on a base plate, the background
being a matt black panel. The keys are in gloss black plastics. The
diameter of the unit is 135mm.
Used for manual pressbutton dialling. In addition a pre-selected number can
be 'stored' under each of these ten buttons.
Pressed and released prior to keying in a new 'stored' number.
Depressed whilst a number is being 'stored'.
Depressed once when calling a stored number, followed by the pressing of the
button (1-0) under which the number is stored. Repeat button is
depressed twice to actuate 'try-again' facility.
The unit is normally switched on and off by lifting or replacing the
handset. However, if a 'stored' number has already commenced pulsing
out it can only be cancelled by pressing the cancel button.
Lights when unit is pulsing out a number.
Maximum current drawn from line with telephone 'on-hook' is 3 MA.
Power unit and junction box - switched
Used where line voltage is less than 50V nominal e.g. 24 volt or where
powering from the line is not permitted.
Taken from Publicity Leaflet AA/5.74/7M (dated 1974)
To store a number
- With phone on hook, press and hold the * button.
- Dial #
- Dial the chosen store number.
- Dial digits to store.
- Release *