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Page Updated 22 July 2004

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Storno model numbering

This page gives guidance to help identify the various Stornophone equipment ranges from the model numbers.


Serial No.
    C=Communication Equipment (Storno)
S=Communication Equipment (Siemens badged models)
First letter denotes origin:
SE=Special Engineering
T=Transmit only
R=Receive only
    Specification Info  
    F=Fixed Station
L=Local 600 mobile
    Additional information regarding tone equipment, number of channels, transmitter power, supply voltage, Intrinsically Safe version, etc.  
    Model Series Number  
The Suffix and Spec formats vary according to model and further breakdowns of these will be included in the model specific pages as they are expanded.
    Tx Frequency Band
1=146-174 MHz
3=68-88 MHz
4=95-108 MHz
5=350-420 MHz
6=420-470 MHz
7=136-146 or 174-225 MHz
8=806-870 MHz
9=860-960 MHz
    Rx Frequency Band
(As above, later models only)
    Channel Spacing
3=20 or 25kHz
    a=Later H/W revision
F=Fixed Mobile
S=Synthesized or Simplex
Z=Mk.II 4000

    Standard model numbering
The table above holds true for the majority of models but the model number formats have changed over the years and the main variations are described below.

It should be noted that the frequency band digits give the approximate frequency range but the specific upper and lower frequency limits may vary between models. Also consider that although the model number indicates the specification of the unit when it was manufactured, it may have been modified later. In particular the UK Radiophone models CQM612 spec.7205 and CQM713 P3 are very likely to have been modified from 25 kHz to 12.5 kHz channel spacing (indicated by a white paint mark to the left of the Serial No. plate).

If the main identification label is missing, it is still often possible to get clues to determine the frequency band and channel spacing by opening the radio and noting the markings on the RF modules as they follow similar numbering conventions to those used for the model type, e.g. A CQM5334 with no external label can be identified by the internal RF5334 label on the RF board..

Sub-band splits
Many models cover the higher and lower ranges of their respective frequency bands just by realignment or jumper setting changes but some need hardware changes, particularly the CQP500, CQP7000, CQP8000, CQM5500, CQP4660 and UK Band III models.

Valve models
The early valve models used a shorter form of the above format giving the frequency band digit before the model series digit and followed by a suffix that indicated the channel spacing. e.g.

Stornophone 33
CQF33C-14 would be a base station in the 68-88 MHz band with 25 kHz channel spacing
CQF13C-3B would be a base station in the 146-174 Mhz band with 50 kHz channel spacing

Viscount / Stornophone V / Viking
CQM39-25 would be a mobile in the 68-88 MHz band with 25 kHz channel spacing
CQM69-50 would be a mobile in the 420-470 MHz band with 50 kHz channel spacing

Stornophone Hundred series
For the 'Hundred' series models, CQP500, CQM600, etc. a single digit indicating the Tx frequency band was given although there were examples of split band models, for example the old UK Mid-Band allocation had a mobile Tx frequency in the 95-108 MHz band but the matching receive channel was 33 MHz higher in the 136-146 MHz band. In this example the mobile might be a CQM644 whereas the base station might be a CQF674. In these cases it is best to determine the receive band from the channel frequency labels or look at the number on the receiver module which uses a similar band numbering e.g. RC641 = 95-108 MHz, RC671 (and occasionally RC614) = 136-146 MHz.

Stornophone Thousand series
For the 'Thousand' series models, CQM5000, CQM6000, etc. the Tx and Rx frequency bands are both given so there is no confusion except that the UK Band III models use 7 as the frequency band digit. It is safe to assume that models such as CQP4774, CQM6774 and CQF9774 operate within the UK Band III 174-225 Mhz range as the Mid band mobile transmit frequencies had been released to extend the Band II broadcast band (87.5-108 MHz) by the time these were manufactured.

Stornophone 5500

The 5500 is not part of the CQM5000 series and is just a rebadged Motorola MC-Micro mobile.

Although the CQM900 appears to be a Storno Hundred series mobile, the frequency band indication follows the 9000 format and the model number is usually prefixed by M or SM (Stornomatic) instead of the usual CQM.

Apart from the CRP800 series which were receive only CQP800 models, most Storno pagers are re-badged third party models such as the CRP240 secondary pager range from Oelmann Electronik and the RE214, RE227 and RE228 range supplied by Swissphone.

More details regarding model suffix and spec. numbers will be added within the specific model breakdowns as the site develops but you can find summaries of the various models on the PMR page.


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