GEC AUTOMATIC, C.B. and MAGNETO TELEPHONE SWITCHBOARDS
DESK STYLE
CORDLESS TABLE PATTERN
For Magneto, C.B. and Auto/C.B. Working
CS6100 Series and MS6130 series
Small C.B. and Auto/C.B. switch-boards in the Catalogue No.
CS.5120 series,
described in catalogue leaflet CSL.8, which have a maximum of twelve lines, have
been superseded by a new range of switch-boards described in this leaflet.
A similar new range of magneto switchboards replaces those in the Catalogue No.
MS.5120 series and MS.5130
series, described in leaflet MSL.5, which have a maximum of twelve lines.
The new switchboards have a pleasing appearance
that blends well with modern-style furnishings. Each switchboard has a
two-tone colour finish of light and dark grey. An alternative finish of
green and biscuit can be supplied when specified. The switchboard will operate
under tropical and temperate climatic conditions.
The keys and indicators used in all the switchboards are of a new miniaturised
type. Magneto and C.B. models are mounted on the same size base
and have the same outer cover, but different keyboards and indicator panels. The
Auto/C.B. model has the same base and keyboard as the C.B., but the front panel
of the cover is moulded to accommodate a dial. Wiring for the dial is
included in both models, a five-way plug and socket being used to connect the
dial to the main wiring. Conversion from C.B. to auto working is thus
simply by changing the cover, plugging in the dial and removing a strapped
connexion.
The cover can be simply removed by loosening four captive screws. The key
shelf and apparatus mounting are hinged to open outwards so giving easy access
to all components and wiring for maintenance. A terminal strip is
fitted on the base of the switchboard and connexion of exchange and extension
lines can be made direct without the need for an external junction box.
However, a flexible multiway cable can be used to connect the switchboard to a
nearby junction box to allow wiring changes to be tarried out without
interfering with the operation of the equipment.
All switchboards are fitted with a heavy-duty rotating-magnet hand generator.
This is particularly smooth and quiet in operation, and requires less effort to
turn than the former rotating armature type. In general, the operating
features of the new switchboards are similar to former models, but the smaller
keys and sloping keyboards permit speedier and smoother operation.
C.B. AND AUTO/C.B. SWITCHBOARDS
The C.B. and Auto/C.B. switchboards are equipped for either two exchange lines
and four extensions or three exchange lines and nine extensions. An extension
user calls the switchboard by simply lifting the handset. A springset in the
telephone closes to complete a loop and operate an indicator on the switchboard.
The operator answers by throwing the associated speak key and her own telephone
key, then completes the connexion either to another extension or to the main exchange. She is then free to deal with other
calls. On the completion of the call a clear down signal is given at the
switchboard automatically when the extension handsets are restored.
Provision is made for exchange lines to be switched to selected extensions for
night service or at other times when the switchboard is unattended.
Three connecting circuits are provided for the 2+4 line model and five
connecting circuits for the 3+9 line model. Telephones recommended for use
with these switchboards are described in G.E.C. Catalogue Leaflet STL.13.
Satisfactory operation can be obtained if the line loop resistance between
exchange and extension does not exceed 1000 ohms.
Power for the exchange may be obtained either over a separate power line from
the exchange, or from a local power unit or battery. The nominal operating
voltage is 24 volts, and the busy hour drain is approximately 0.4 amp for a 2+4
line and 0.6 amp for a 3+9 line switchboard. A battery fuse is fitted at
the side of the base. This can be replaced without removing the
switchboard cover. Power for the exchange calls is obtained from the
public exchange battery.
 |
 |
3+9 Desk Style Cordless Switchboard - CS6128 |
Internal View - CS6128 |
MAGNETO SWITCHBOARD
The magneto switchboards are equipped for either six or twelve lines. An
extension user calls the switchboard by turning the generator handle and lifting
his handset. At the switchboard the indicator operates and the operator answers
by throwing the associated speak key and her own telephone key. She then
completes connexion by ringing the required line and connecting the two parties
for speech. The operator is then free to deal with the next call. At
the conclusion of a conversation the extensions replace their handsets and "ring
off" by turning their generators to signal to the operator that the connexion is
no longer required. Three connecting circuits are provided for the 6 line
model, and five connecting circuits for the 12 line model.
A 3 volt battery (two 1.5 volt cells) is required in the switchboard
operators telephone (speech) circuit, and a similar battery is required to
operate the audible calling alarm. These batteries are only supplied when
specified on orders
Telephones for use with these switchboards are described in G E C Catalogue
Leaflet STL.11.
 |
 |
12 line Magneto Desk Style Cordless
Switchboard - MS6132 |
Internal View - CS6132 |
C.B. AND AUTO/C.B. SWITCHBOARDS
Catalogue No. |
Type |
No. of lines |
Connecting Circuits |
Weight |
Dimensions |
Exchange |
Extension |
kgs |
cms |
CS.6123 |
C.B. |
2 |
4 |
3 |
10.5 |
33 x 21.6 x 33 |
CS.6124 |
Auto |
2 |
4 |
3 |
10.5 |
33 x 21.6 x 33 |
CS.6127 |
C.B. |
3 |
9 |
5 |
12.5 |
33 x 21.6 x 33 |
CS.6128 |
Auto |
3 |
9 |
5 |
12.5 |
33 x 21.6 x 33 |
MAGNETO SWITCHBOARDS
Catalogue No. |
Extension Lines |
Connecting Ccts |
Weight |
Dimensions |
kgs |
cms |
MS.6131 |
6 |
3 |
7.26 |
33 x 21.6 x 33 |
MS.6132 |
12 |
5 |
8.85 |
33 x 21.6 x 33 |
Supplement to GEC Catalogue Leaflets Nos. CSL.8 and MSL.5
|