Issue 7, 26.1.66
All dials and dummy dials associated with telephone switchboards and subscribers
telephones should be fitted with dial-centre labels. It is essential that the labels
fitted are suitable for the emergency arrangements at the installation concerned. The
maintenance procedure for dial-centre labels is contained in A 5102.
Types of labels Click here to see a picture of the different
dial-centre labels and refer to Table 1 for details their particular applications. The
various types of labels are:-
(a) Labels No. 160 which are blank paper disks.
(b) Labels No. 160... which are similar to Labels No. 160 except that they contain printed
instructions in addition to the space provided for the exchange name, or code and number
etc. Label No. 160 followed by a suffix letter indicates the type of label to be used for
particular installations as indicated in Table 1.
(c) Labels No. 386... which are paper labels introduced to replace certain Labels No. 160...
Although specially prepared for the Dial, Automatic, No. 21... and Dial, Automatic, Dummy,
No. 6 and No. 7, Label No. 386... may be fitted on earlier types of dials and dummy dials.
Label No. 386 followed by a suffix letter indicates the type of label to be used for
particular installations as indicated in Table 1.
(d) Labels No. 442... which are similar to Labels No. 386...except that they are
adhesive-backed temporary dial-centre labels which can be forwarded by post to
subscribers. They are for use when a change of label only is required and so avoid a visit
by an engineering officer solely for this purpose. They will be fixed to the top surface
of the label protector and replaced with permanent labels at a suitable opportunity. Their
main field of use is for exchange conversions, Area correction transfers and change of
emergency code. When forwarded by post for subscribers to fix, they will be associated
with an illustrated folder which explains why they are required and how to fit them. The
labels will be requisitioned by the Traffic or Sales Divn. Labels which are to be posted
to the subscriber should be printed locally with the exchange number by the Traffic or
Clerical Division, according to local arrangements, who will be responsible for
dispatching them with the folders to the subscribers (see Tp. S.I. El VI). Labels No.
442... can be consecutively numbered by the printer. This might be of benefit where large
blocks of numbers are involved. It should be borne in mind, however, that for any exchange
number only one label will be printed and therefore, to cater for any additional
requirements, labels for local printing of the number will still be required.
Labels are not now provided with a nick, and care should be taken to fit the label with
the printing horizontal. It will be necessary to punch through the label with the
retaining spring when it is used to retain the label in position.
Labels (most of which are specially printed) should be requisitioned as early as possible,
allowing at least three months for delivery. Requisitions should be submitted to the
Supplies Dept. (MP3/1), Mount Pleasant, London, E.C.1, or, for Scotland and N. Ireland
Regions and Lancaster, Middlesbrough and Newcastle-upon-Tyne Areas, to the Supplies Dept.
(E3/2), Russell Rd., Edinburgh, 12 on forms A 1097, accompanied by a printing schedule on
form A 1098 which should give the particulars of the printing required. Care should be
taken to see that the schedule states the precise printing required. The economic
quantities for each sort of label are multiples of 100 with a minimum of 100 and this
point should be considered when estimating quantities to be requisitioned. Separate
requisitions should be submitted for each type of label, e.g. 160BB, 160R, 386A, 386B.
Requests for labels which are departures from the standard types shown in Table 1 should
be forwarded to the Traffic Divn. for approval. The Traffic Divn. will be responsible for
ordering non-standard labels which will be requisitioned as 'Labels No. 160, Special' and
have red and black characters on a white background.
All labels will be supplied with the appropriate information printed as shown in the upper
part of the dial label picture, the lower part gives
some examples of the additional printing that may be necessary. The printing of the
exchange name, or code and extension (Extn), if required, must be called for on the
requisition. The printing of Extn. may be requested on all labels with the exception of
Labels Nos. 160, 160K and 386F. Manuscript entries should not be made on dial-centre labels.
The only printing to be done locally is the subscriber's exchange number, P.B.X. extension
number, station number or Private circuit number which should be done with a Machine,
Numbering, No. 5 or No. 31. Labels used at P.B.X. extensions should show the first number
only of the P.B.X. group. For large P.B.X. installations where the quantity of labels
required exceeds, say, 100, printing of the exchange number on each label, in addition to
the exchange name or code, should be requested when the requisitions are forwarded. Labels
No. 160 for main exchange switchboard dials should be left blank; spare labels (plain side
uppermost) may be fitted.
TABLE 1 - types of labels
Magneto C.B.S. C.B. emergency emergency
D.E.L. (Ord) 160C 386C 386 386B 386D
D.E.L. (subs C.C.B.s)
(Note 2) 160 160 160 160 160
plans (Note 3) 160C 386C 386C 386B 386D
Without dial 160C 386C 386C 386C 386C
" " (n/s) 160C 386C 386C
With dial 386B 386D
" " (n/s) 386B 386D
C.C.B. 160C 386C 386C 386C 386C
Without direct access 386B 386B 386B 386B
With direct access 386B 386B 386B 16OBB
With night service 386B 386B 386B 16OBB
Manual 386C 386C 386C 386C
With C.C.B. 386B 386B 386B 386B
P.A.B.X. 5 386G
Full facilities 386E 386B 386D
Restricted facilities 16ON 16ON 16ON
Exchange service barred 16OR 16OR 16OR
External extension on
H.E.S. 1 and H.E.S. 2 386C 160T 386D
H.E.S. 3 external extension 386E 386B 386D
Private circuit 160K 160K 160K 160K 160K
Call office plans and
telephone switchboards 160 160 160 160 160
P.A.X.s 386F 386F 386F 386F 386F
NOTE 1:- When the operator code is not yet '100' Label No 386A will
replace Label No. 386D
NOTE 2:- When emergency instruction cards are not provided, fit Label
No 386... showing the appropriate emergency code
NOTE 3:- When fitted as P.M.B.X. or P.A.B.X. extension see appropriate
NOTE 4:- When adhesive-backed labels are required Labels Nos. 442A, 442C
and 442D replace Labels Nos. 386A, 386C and 386D respectively
On Labels No. 160 for call offices and P.B.X. switchboards, the exchange name should be
printed in capitals throughout and will generally be in a horizontal line or fines. If
however the exchange name has only one word and this contains more than 13 letters, the
printing should be arranged in the form of an arc, a hyphen being regarded as one letter.
The hyphens in a hyphenated name should be shown if the exchange name can be printed in
one line, but if the words of a name occupy more than one line, omit the hyphen. Typical
examples of exchange name, or, code and number are shown in the lower part of the dial
label picture with the exception of Labels No. 160 the
exchange name should be printed as follows:-
(a) Director areas. The first three letters should be capitals and the remainder in
lower case, e.g. HEAdquarters, or S.T.D. code and exchange code in the following manner
(b) Non-director, U.A.X. and manual-exchange areas. If the exchange name does not form
part of the dialling code, only the first letter should be a capital, e.g. Dunstable.
For the identification of certain official telephones the exchange number is followed
by the code 'G.P.O.'; this code should be shown on the dial-centre labels of all such
Printing of the exchange and extension numbers on Labels No. 160... and Labels No. 386...
should be done locally using a Machine, Numbering, No. 5 Shown to the right). Printing of the exchange number
on Labels No. 160 for use at call offices should be done using a Machine, Numbering, No. 31.
Care should be taken to print the numbers horizontally, using the template base of the
machine as a guide. Use only the printing ink supplied for use with the numbering
machines. The ink pad should be replenished with a few drops from the tube and spread
evenly by means of the setting stick. Further supplies of ink in small tubes can be
obtained on requisition from the Supplies Dept. When resetting the printing wheels, take
care to avoid damage, by using only the small setting stick supplied with each machine.
Clean the numbers when necessary to ensure that the characters are sharply defined. For
this purpose a suitable brush may be purchased locally.
Temporary labels for conversions and area correction transfers
During conversion from a manual to an automatic system, or transfer from one exchange to
another, the exchange number shown on the subscriber's telephone before transfer should be
that relative to the old exchange; immediately after transfer, the instrument should
display the new number.
For conversions from a manual to an automatic system, one of the following methods should
be adopted to ensure that the correct number and emergency code is shown at all times:-
(a) If there is a change of number before the instrument is changed.
(i) At the number change a Label No. 442C is posted to the subscriber.
(ii) At the instrument change a permanent label is fitted and covered with the Label No.
(iii) At conversion the subscriber removes the Label No. 442C to expose the permanent label
with the correct emergency code.
(b) If there is a change of number after the instrument change but before conversion.
If the new number is known at the time of the instrument change apply (a), (ii) and (iii).
If, exceptionally, the new number is not known at the time of the instrument change.-
(i) Refit the old label in the new telephone.
(ii) At the number change a Label No. 442C is posted to the subscriber.
(iii) Between the number change and conversion a visit by an engineering officer will be
necessary to fit a new permanent label while retaining the Label No. 442C.
(iv) At conversion the subscriber removes the Label No. 442C.
(c) If there is a change of number or emergency code on conversion.
(i) If the new number is known at the time of the instrument change apply (a), (ii) and
(iii). (ii) If not, at conversion, post Label No 442A or No 442D with the final letter of
advice to the subscriber.
(iii) A permanent label will be fitted at the next visit by an engineering officer.
For transfers from one automatic exchange to another where a change of name, code or
number is involved, Labels No 442... may be posted to the subscribers or, alternatively,
if a visit is to be made by an engineering officer, a permanent label bearing the new
number should be fitted and covered with an equivalent adhesive label bearing the number
relative to the old exchange.
Transfers from one C.B. exchange to another, where a change of exchange name and number is
required, should follow a similar procedure to that specified above.
Normally, extension instruments with dials or dummy dials should also be fitted with the
temporary labels as described above, but the requirements of large P.B.X.s should be
considered on their merits in consultation with the responsible Traffic officer. It will
generally be possible to arrange for the P.B.X. operator (following the receipt of
notification from the Traffic officer) to request, during the course of normal operating,
the extension user to remove the temporary label. Alternatively the subscriber may consent
to display a notice requesting the removal of all temporary labels at a given hour.
Co-operation with the responsible Traffic officer is essential whenever temporary labels
are to be fitted, so that the necessary arrangements may be made to advise the subscribers
of the time and date on which these labels should be removed.
Stocks of labels
Installation Controls and Maintenance Controls should stock dial-centre labels for each
exchange area controlled. This arrangement will usually allow new installations and
additional stations to be equipped with the correct dial-centre label when the fitting
work is being done or a dial- centre label has to be changed.
At some call-office installations, owing to the repeated mutilation and defacement of
dial-centre labels, it may be advisable to store up to six additional labels. These spare
labels should be placed in an envelope, together with six securing rings and transparent
protectors (Dial, Automatic, Parts Nos. 1/DSP/497 and I/DPR/4) and stored in the coin-box
casing for replacement purposes.
Issue 4, 3.1.52
DIAL CENTRE LABELS FOR SUBSCRIBERS APPARATUS
Special Labelling Arrangements for Automatic Areas where the emergency call 999 facility
Scope of instruction
This Instruction describes the types of dial-centre labels to be used in automatic areas,
in which the '999' facility (with priority answering) is available or is to be introduced,
in accordance with Automatic, A 1902, and should, be read in conjunction with A 3202.
When this facility is to be introduced, a new dial-centre label ("Label No. 160")
should be fitted at every station equipped with a dial, except public call-offices
equipped with a coin-box and dial. For other cases where existing labels are retained. The
type of label to be fitted at any station can be ascertained by reference to loose-leaf
diagrams N 1951 to N 1990 (for public call-offices, see N 1950). For the maintenance
procedure for labels, see A 5102.
Label Nos. 160GA, 160GB, 160BA, 160BB and 160SA have been designed for use in these
exchange areas. The precise details of these labels and their uses are shown in Table 1,
and each label is illustrated in the dial label picture.
No Dial on which to be used Installations concerned
For use where the station directly
connected to the public exchange
16OGA Dial Automatic, No 10... Direct exchange lines
Extn plans 1, 1A, 1B, 3, 4, 8 & 11
Extn plans 5, 5A, 7, 7A & 8A, main
Dial Automatic No 10 or 11... Call office plans 1A, 2A, 2C & 2G
Call office plans 2C, 5E and 5F
(Subscribers stations with prepayment
coin boxes where emergency notices
are not displayed (except extension
plans 5, 5A, 7, 7A and 8A extension
telephones, see Label No 160 GB)
For use when the extension station is
switched through to the public
160GB Dial Automatic No 10... P.M.B.X. extensions
Extension plans 9 and 10
House exchange systems - external
extensions, with or without
recognised night-service numbers
House exchange systems - subsidiary
to P.B.X. - stations with full
Dial Automatic No 10 or 11... Extension plans 5, 6A, 7, 7A & 8A
extension telephones with or without
160BA Dial Automatic No 10... P.A.B.X. extensions with direct
access to the public exchange
16OBB Dial Automatic No 10... Switchboards AT 1837
P.A.B.X. extensions without direct
access but with occasional direct
calling facilities to the public
160SA Dial Automatic No 10... House exchange systems (with or
without external extensions) at 1st
or 2nd choice main stations and
stations with full facilities
Printing the instruction Emergency calls for Fire, Police, Ambulance, Dial 999, etc will be printed in red on the upper portion of
all Labels No. 160... for use in areas where the 'emergency call' facility is available. On
"Labels No. 160BA" the digit to be dialled to gain direct access to the public
exchange will also be printed in red. The exchange name is to be printed in capitals of
uniform size on all labels and additional matter, such as the words " Extn",
" Station", " Night Service", etc is to be printed on certain labels
Subscribers conversions and area correction transfers
For subscribers' circuits being converted in, or transferred to, an automatic area where
the emergency call facility is catered for a "Label No. 188D" has been designed
to cover the lower portion of the dial-centre label in these areas during the transfer
All labels should be requisitioned from the Stores Dept, Mount Pleasant, London, E.C.1, on
form P 1156G, and particulars of printing required should be given on a schedule
accompanying each requisition. Care should be taken to see that the schedule states the
precise printing required.
Existing dial-centre labels to be retained
The existing labels should be retained as follows :-
(a) "Labels No. 160" (exchange name and number only printed) on call-office plan
(b) "Labels No. 160" on call-office plan nos. 2G, 5E and 5F (telephones in kiosks
(c) "Labels No. 160" on stations without coin boxes, associated with subscribers'
plan no stations with coin-boxes.
(d) "Labels No. 160B" and "Labels Nos. 160D or DA", on P.B.X. extensions
which are equipped with post-payment coin-boxes and where the associated telephones are
fitted with "Dials, Automatic, No. 10FA" or "Dials, Automatic, Dummy, No. 3
(e) "Labels Nos. 160N, 160P or 160R" on house exchange stations with restricted
facilities; these stations are not equipped with dials.
Stocks of labels
Installation Offices and Advice Note Control Centres should stock for each automatic
exchange area with '999' facility (see Table 2) four types of dial-centre labels: one for
D.E.L.s with dials, two for extensions with dials and one for extensions without dials.
This arrangement will permit, in the majority of cases, of new installations and
additional, stations being equipped with the correct dial-centre labels when the fitting
work is being carried out.
For large P.B.X. installations where the quantity of "Labels No. 160..." required
exceeds say 50, or for house exchange systems, opportunity should be taken to have the
exchange number - in addition to the exchange name, etc - printed on each label when
requisitions are forwarded upon receipt of the Advice Note.
A stock of "Label No. 160..." with the exchange name, number and "EXTN"
printed thereon, may also be held for new work and maintenance where any large P.B.X.
installation exists in the exchange area controlled.
The Rate Book description of each label, which should be stocked for each exchange area
controlled, together with details of printing are shown in Table 2.
Type of exchange Labels to be No of Detail of printing
area stocked types
Automatic (director 16OGA 2 (i) Exchange name......
or non director) (ii) Exchange name & extn
with 999 facility 160GB 1 Exchange name and extn
160DA or 1 Exchange name and extn
160D See A3202 Fig. 4
"Label No 160DA" supersedes "Label No 160D on reprint. i.e. when the
stock of the latter type for any exchange area is exhausted and a
new supply has to be printed for that area.
Issue 5, 12.9.39
It is important that labels fitted on subscribers' telephones be maintained in a
satisfactory condition and this Instruction indicates the procedure to be adopted for this
Inspection of labels
All telephones should have been labelled when fitted, in accordance with the Instructions
and loose-leaf diagrams which deal with the initial labelling of subscribers, and
call-office telephones, viz,
A 3114 (Enlarged number rings, "Labels No. 197....")
A 3202 (Dial-centre and telephone labels)
A 3913 (Dial-centre labels for areas with '999' facility)
G 3103 ("Labels Nos. 219 and 220" for autodials) and loose-leaf Dgms. N 1950 to
Officers employed on the maintenance of subscribers or call office telephones
should-whenever visiting such installations - inspect the labels and transparent
protectors and take steps to replace any which may be found to be incorrect, defaced or
LABELS ON DUMMY AND AUTOMATIC DIALS Labels to be carried
To enable replacement of labels on subscribers telephones and coin-box installations to be
effected immediately necessity is observed, spares of each type of Labels No.
160 - with the
exception of those specified below used in the maintenance office areas, printed with the
name of the exchange or exchanges concerned, should be carried by each officer in an
"Envelope No. SS 293". Details of the appropriate labels are given in the
Instructions and loose-leaf diagrams referred to in the first paragraph. A numbering
machine (see TOOLS & TRANSPORT, Hand Tools, A 0060) should be carried by each
maintenance officer and should be used to insert the exchange-line numbers and extension
numbers on "Labels No. 160 ..." (see A 3202).
Spare labels to be held at the installation
At installations where "Labels No. 160" (which should have the exchange name and
number printed by the Stores Dept.) are fitted, a spare label is provided initially (see A
3202 and A 3913). When replacement of spares becomes necessary, two additional labels
should be ordered and fitted in the dial-label holder.
In areas where labels are liable to frequent mutilation or defacement, six additional
"Labels No. 160," with the exchange name and number printed on them, and six
"Dials, Automatic, Parts Nos. 2/SSP/487 and 1/SPR/1" (securing ring and
transparent protector, respectively) should be placed in an envelope and kept within the
coin-collecting box easing, to be used as replacements become necessary. When spares of
any item have been reduced to two, the maintenance officer concerned should arrange for
the stocks to be replenished.
MISCELLANEOUS LABELS House Exchange installations
The necessary markings, including the exchange name and number are printed on both sides
of " Labels Nos. 222 and 222A " so that a label may be reversed if and when one
face becomes dirty or disfigured, or when repeated change of markings by a subscriber
renders it unsightly. When for any reason, it becomes necessary to replace a "Label
Nos. 222 or 222A" a new one should be requisitioned from the Stores Dept; the
requisition should indicate the exchange name and number required to be printed on the
label (see A3202). Labels may be removed from telephones - as described in Q 5001.
"Labels Nos. 219 and 220" are used for "Autodials Nos. 1 and 2",
respectively. Two labels are required on each autodial to indicate the position of the
various numbers. These labels are supplied initially by the D.M. with the name and
telephone number, of each subscriber to be set on the autodial, already inscribed. When
for any reason it becomes necessary to replace these labels, the D.M. should be requested
to prepare and supply new ones, details of the required inscription being forwarded with
the request (see G 3103).
The Rate book descriptions of the machines and parts referred to above are:-
Machine, Numbering, No. 5, Complete
Machine, Numbering, No 5
Case for Machine, Numbering, No 5
Setting stick for Machine, Numbering, No 5
Bottle of ink for Machine, Numbering, No 5
Felt, Inking Pad, NM 11
Holder for Inking Pad, NM 13