Vanguard 10E telephone is available for rental and retail sales. It is similar in
appearance to the rest of the Vanguard range and offers the following features:-
- On Hook Dialling (with switchable Monitor volume).
- 10 Dedicated Memory Keys (24 digits).
- Latching Secrecy Button.
- Ringer Volume Control.
- Touch Tone Dialling.
- Recall (ELR & TBR).
- Wall Mountable.
- Tone/Pulse Switchable
Customised Vanguard 10Es (i.e. with customer's logo printed on the case) are also
A three position slider switch (labelled LD-MFT-MFE) is provided on the right hand side of
the instrument. This is normally supplied set to 'MFT' for MF signalling with Timed Break
recall (TouchTone), but should be shifted to LD for Loop Disconnect/Mixed signalling with
Earth recall or to 'MFE' for MF signalling with Earth recall as necessary.
Mixed signalling is the facility whereby a call may be set up in the LD mode and continued
for the duration of the call in the MF mode by pressing the '*' button to access certain
network based facilities.
Numbers are stored on Vanguard 10E by the following method:-
- Lift handset, press 'Memory Store' (confidence beep).
- Press required memory location (confidence beep).
- Key number to be stored (confidence beep for each digit).
- Press 'Memory Store' (confidence beep).
If more than 24 digits are keyed, the audible tone changes to an error beep.
The memory locations can also hold 'Goto MF' and 'Recall'.
There is no provision for storing PBX access pauses in any of the memory stores, PBX
access codes may be keyed manually before using stored number or last number redial
Made by Northern Telecom Europe (NTE) Ltd.
Approved under Approval number S/1000/3/M/502246 for use on DELs and PBXs in categories
1,3,5,7,9 & 11.
REN, Vanguard 10E has a REN of 1 and is intended for use in normal Domestic or Residential
locations. They are not suited for use in bathrooms or other locations prone to damp or
Approximate overall dimensions are 216mm x 152mm x 70mm, weight 871 grams. When mounted in
an enclosure an additional 13mm should be allowed along one edge for the handset cord. NB
only Vanguard II Inductive Coupler models should be used for telephones in lifts.
Two 2.5mm x No.8 pan-head wood screws and wall plugs are provided for wall mounted use via
key-hole slots in the base of the instrument.
The Signalling switch should be set on installation according to the type of exchange/PBX
it is used on, i.e.:-
MFT - for Digital or Modernised TXE4 exchanges and a minority of PBXs (i.e. for TouchTone,
Star Services and Timed Break Recall PBXS).
MFE - for the majority of modern PBXs (i.e. with MF signalling with Earth recall).
LD - for un-modernised exchanges and older PBXS.
the rear legs should be extended to ensure handset fully operates the gravity switch on
the handset and line cords may be routed through the alternative channels in the base as
required and the line cord may be shortened by re-terminating. The handset retaining lug
should be turned through 180 degrees to support the handset.
BT Item Codes
Telephone 4005 AR Vanguard 10E, Alpine White
877908 (87 7959)
Telephone 4005 AR Vanguard 10E, Oatmeal
877909 (87 7960)
Telephone 4005 AR Vanguard 10E, Charcoal Grey
877910 (87 7961)
Telephone 4005 AR Vanguard 10E, Red
877951 (87 7962)
Idle - Normal capacitor loop, additionally these telephones draw on hook current
(typically 25 micro Amps) to maintain stored/last number memory. This may give apparent
'Low Loop' line test conditions.
Seized - Normal press button telephone loop. The electronic keypad and transmission
circuitry may give 'high resistance' tele-loop line test conditions as with other press
Vanguard 10E should only be used on version 8/9 of a 1+1 carrier system, a NTE's.
Vanguard 10E is not suitable for use on Shared Service.
Secrecy LED will only light up in handset mode.
There is no provision for memory back-up batteries in Vanguard 10E telephones, saved/last
number memory cannot be guaranteed if the telephone is removed from line for more than 5
minutes although in practice memory may last for several hours on these telephones.
- MF signalling - continuous tone whilst button is pressed (see note).
- Timed break recall - approximately 90 ms.
- Earth recall - when the recall button is pressed there is a pause of 800 ms, then
approximately 800mS recall and finally a 800mS pause.
Note. The method of 'continuous' MF signals whilst the button is pressed way cause 'double
access signal' problems on Pentara switches. This can be overcome by storing the access
digit in a memory. Which will then give a timed digit duration of approx. 100mS.
As some facilities will not operate effectively with a 2 + 8 or Renown PBX's it is
recommended that Vanguard 10E is not installed.