TELEPHONE No's 9515 & 9525

Telephone No. 9515AR
This phone is similar in appearance to Viscount 12 telephones but incorporate user accessible signalling (LD/MF) and recall (Earth/Timed Break conversion switches).  They are known as Viscount Dual Signalling telephones.  There is no PABX access pause facility with Telephone No. 9515AR, access digits must be keyed before pressing the MR button.  The telephone will then pulse the remaining (exchange line) digits to line.

Production ceased in the early 1990's.

Key features:

• Loop Disconnect pulsing and MF 4 signalling
• Earth and Timed Break recall
• Mute
• Incoming calls signalled by tone caller with adjustable volume control
• Last Number Redial (21 Digits)

Colours:  White

Click here for the 9515AR Limited Edition

User Guide

Telephone No. 9525AR
Called the Viscount 10 this telephone is similar in appearance to Viscount 12 telephones but incorporate user accessible signalling (LD/MF) and recall (Earth/Timed Break conversion switches).  There is no PABX access pause facility with Telephone No. 9525AR, access digits must be keyed before pressing the MR button.  The telephone will then pulse the remaining (exchange line) digits to line.  They are known as Viscount Dual Signalling telephones.

Key features:

• Pulse and Tone dialling
• Earth and Time break recall
• 10 Indirect memories (each keypad digit button can store a telephone number up to 18 digits long)
• Mute
• Last number redial (21 digits)

Colours: Beige and Ice Grey

Click here for pictures of this Viscount model with a clear case. The design team would sometimes commission clear cases during the prototyping phase of a product development in order to assess internal clearances between various component parts.
 

Additional Information

Made by STC Ltd

Available from BT on sale or rental terms.

Approval Staus
Viscount telephones 95l5AR and 9525AR may be used on PBXs approved for use with telephones in categories 1, 3, 5, 7, 9 and 11.

Ringer
Viscounts 9515AR and 9525AR both have a Ringer Equivalence number (REN) of 1.  Telephone instruments (BT and non BT supplied) are required to be labelled with their REN so that users do not exceed the permitted maximum number of ringers in circuit. A telephone with a REN of 1 has a ringer performance comparable to that of a standard instrument (Telephone No. 8746), the total REN value of all ringers connected at any time at an installation must not exceed 4.

The REN does not guarantee compatibility between ringers of different technologies on the same installation.

Adjusting the volume of the tone caller
A high/low volume control is located on the right hand side of the telephone case; the highest position at the front, the lowest position at the rear.

Line Cord
Viscount 9515AR & 9525AR telephones are supplied with a line cord terminated with a Plug No. 43lA for use in Phone Socket installations.

Changing the signalling mode during a call
Once connected, after Pulse dialling a call, the signalling mode can be changed Tone dialling mode. This is particularly useful when accessing computers or voice messaging systems.

• Set up your call in the usual way
• Press the '*' button when you wish to send data - all subsequent digits will be sent in tones
• When the handset is replaced the telephone will revert to normal use for telephone calls

Using the memory store on the Telephone No. 9525

Wall mounting
A separate mounting bracket was supplied and these were produced in the same colours as the telephones.

A plastic peg is supplied with the telephone, this should be fitted to the gravity switch plunger to prevent the handset from falling off the cradle when the instrument is wall-mounted.  The peg is fitted by pushing the two prongs into the holes in the plunger and snapping of the excess lug.  The line cord may be re-routed along the retaining channels on the base of the instrument, alongside the handset cord if required.  A 300 mm line cord is also available for wall mounted use.

Signalling and Recall settings
The switches for these are found beneath a black plastic cover fitted to the base of the telephone.

.

PARTS

TESTING
ON-HOOK
Telephones 9515AR and 9525AR each draw typically 28ma on-hook line current on a 50 volt line to retain stored number memory. This may give apparent 'Low loop' line test conditions.

OFF-HOOK
As with other modern press button telephones, the electronic keypad and transmission circuitry may appear to give High Resistance telephone loop test conditions.
Idle - Normal capacitor Loop test conditions via the master socket and tone caller circuit.

Limited Edition Viscount

The pictures below show a Bronze coloured Viscount that was sold as a limited edition to celebrate the 5 million Viscount telephones supplied to British Telecom

Limited Edition pictures supplied by Phill Dolphin