National Telephone Systems London 16 User manual

Se
National
Telephone
Systems

LONDON 16
TELEPHONE SYSTEM
INSTALLATION MANUAL
National Telephone Systems

London 16 salati Manazi
© National Telephone Systems Ltd. November 1988

London 16 Installation Manual
Table of Contents
1. INTRODUCTION 1
1. 1. Configurations . . همه󰾯 ss. ۰
3 1.2. Tools and test equipment: - . - seer a4 san
1.3. Site requirements , .... ; “y a Ne
Figure 1: POWER PROTECTIVE EARTH ARRANGEMENT. ©... > > >
2. INSTALLATION INSTRUCTIONS 4
2.1.
General
۹۷
4
2.
2.
Outside
line
and
extension
interface
cards
Leavis
asst
Figure 2: SETTING DIALLING MODE ON OUTSIDE LINE CARD... - . . -$
sa Figure 3: SYSTEM LAYOUT К Hear;
2.3.
Wall
mounting
۰۰
E
aa
7
Figure
4:
ORIENTATION
OF
WALLMOUNTING
PLATE
à .
7
L 2.4. Extension and exchange line wiring . = pasa в
Figure Sì IF LAYOUT ....., 8
3. METER PULSE DETECTION 10
- Figure 6: Ол CARD WITH METER PULSE DETECTION دوه󰾯
Figure 7: LOCATION OF بت󰾯 TERMINAIS =. M
= Figure 8: EARTHING ARRANGEMENT FOR METER PULSE DETECTION 12
= 4. VISUAL INSPECTION AND PRE-CONNECTION POWER-UP
CHECK
13
Figure De BATTERY UNK ¿sQ гизе. ъалаа ж жант 13
5.
COMMISSIONING
CHECKS
14
CALL LOGGING PRINTER PORT 15
Table 1: CODES FOR SETTING PRINTER BAUD RATE ............1$
7.
AUXILIARY
PORT
16
Figure 10: LOCATION OF AUXILIARY PORT... 16
[National Telephone Systems

Installation Manual London 16
1. INTRODUCTION
The London 16 must be installed in compliance either with
Parts 1 and 2 of British Standard 6701 (1986); or with the
эт Interim code of Practice for the installation of PABXS
(August 1983); or with British Standard 6506 (1984).
1.1. Configurations
The London 16 telephone system has a total of 16 ports; it
may have up to eight outside lines, giving the following
possible configurations (outside lines + extensions):
0 + upto 16
+ upto 15
upto 14
up to 13
up to 12
upto 11
upto 10
upto 9
upto 8
These configurations are achieved by installing the appro-
priate number of interface cards onto the motherboard (one
circuit per card).
The telephone instruments to be used on the London 16
may be either MF4 (multi-frequency) or loop disconnect
(pulse).
MF telephones must have timed break recall. MF decoders
are fitted as standard on the London 16.
Signalling
on
outside
lines
may
be
either
MF
or
loop
dis-
connect.
An 292320۷24 printer interface is fitted as standard.
س یو س د ماه یا ت
+++++++
National Telephone Systems 1

London 16
1.2. Tools and test equipment
kem
Quantity
Antistatic
wriststrap
1
Terminal
screwdriver
1
‘Small
adjustable
spanner
1
1.3. Site requirements
The London 16 is designed to work in a normal office en-
vironment. The unit should be sited with ease of access in
mind, and should be away from:
+ Hazardous areas
* Processes producing electricity, fumes, dust, gasses or
radiation (e.g. silicon or halon contamination from
photo-copying or fire protection equipment)
+ Electrical meters or switchgear
*
Fire
sprinkler
systems
*
Water
pipes
+ Gas meters, pipes or appliances
+ Dampness
* Vibration
The unit should be installed at a convenient working height
in a well lit room. The room should be one which is nor-
mally supervised, or to which access is restricted.
National Telephone Systems

installation Manual London 16
Figure 1: POWER PROTECTIVE EARTH ARRANGEMENT
Notes
=
Earth
wires
to
be
minimum
2.5
sq.mm,
enclosed
in
capping,
trunking
or
some
form
of
mechanical
protection.
‘Socket
outlet
should
be
surface
mounted
so
that
the
earth
cables
enter
through
a
designated
cable
“knock-out”.
Flush
mounted
sockets
may
be
raised
from
the
wall
using
a
mounting
frame
(MK
part
number
MK
2133
WHI).
Separate
earth
wires
should
be
run
to
the
“Protective
Earth”
terminal
on
the
CCU
chassis
and
to
the
earth
post
in
the
TIF.
National
Telephone
Systems
з

Installation Manazi
2. INSTALLATION INSTRUCTIONS
ZI: General
The
unit
is
wall
mounted,
within
2
cable
metres
of
a
suit-
able
mains
outlet.
The socket should be labelled:
TELEPHONE EQUIPMENT
DO NOT DISCONNECT
Whenever possible, the customer should be asked to pro-
vide a “clean” power supply direct from the power distribu-
tion board.
Figure 1 shows the power protective earthing arrangement.
2.2. Outside line and extension interface cards
WARNING: ANTLSTATIC PRECAUTIONS MUST ВЕ TAKEN
WHEN WORKING ON OR NEAR THE UNIT OR ANY OF ITS COM-
PONENTS.
1. Remove the case lid by undoing the screws at the
base of the unit.
2. Check that all the molex/ribbon connectors are
correctly inserted.
З. Ensure that the outside line (On) interface cards
have been set for the correct dialling mode (MF or
loop disconnect). This is achieved by changing the
position of the Molex link on the ОЛ. interface card
as shown in Figures 2a and b. It is factory set for
loop disconnect dialling.
4. Insert the required number of interface cards into
the slots provided, in their correct positions (see
Figure 3).
National Telephone Systems

Installation Manual
London 16
Figure
2:
SETTING
DIALLING
MODE
ON
OUTSIDE
LINE
CARD
a) Revision C outside line card
b) Revision E outside line card
of
Шот teo?
OUTSIDE LINE INTERFACE
CARD
REV E
INTERFACE CARD 5
шаш
ШШ
Р
ши
8
ga
иот LeD2
National Telephone Systems

Figure 3: SYSTEM LAYOUT
| ОООО ОООО

Installation Manual London 16
2.3. Wall mounting
To wall mount the central control unit, proceed as follows:
1.
Attach
the
mounting
bracket
to
the
wall
as
shown
in
Figure
4.
2. Locate the unit so that the lip of the mounting
bracket fits into the slot provided in the back plate.
3. Fix the unit to the bracket by inserting the screw
provided through the “keyhole” on the back plate.
Figure 4: ORIENTATION OF WALL-MOUNTING PLATE
National Telephone Systems 7

London 16 instalation Mars!
2.4. _ Extension and exchange line wiring
Extensions
are
wired
in
a
2-wire
star
configuration
with
telephones
connected
via
master
jacks
1M/1
Extensions are connected to the TIF in a standard format,
starting with extension 221 (see Figure 5).
Connection
of
PSTN
lines
to
the
London
16
may
be
carried
out by British
Telecom
personnel
only.
The
network
test
and termination
point
is the bottom
Krone
strip
of the TIF
Figure 5: TJF LAYOUT
[
І
т
|
r
б
National
Telephone
Systems

London 16
Offpremises extensions may be provided on the London
16. The following rules will apply:
For extensions not more than 200 metres beyond󰾰 ز
the curtilage of the customer’s premises, the wiring󰾰
must be directly routed, i.e., not with PSTN circuits;󰾰
and not more than four spans of overhead cable󰾰
must be used.󰾰
For extensions beyond the 200-metre limit, the line
between
the
London
16
and
the
distant
extension
must be а low-loss access line, and the lines
between the local public exchange and the London
16
must
be
3dB
or
6dB
low-loss
exchange
lines.
The transmission loss between the local public
exchange and the distant extension must not exceed
10d8.
The system control unit to extension line loop resistance
must
not
exceed
196
ohms(1
km
of
0.5
mm
copper
cable).
Extension wiring can be internal or external to the build-
ing, up to the extension line signalling limit of 196 ohms.
The
length
of
extemal
line that
can
be
installed
without
overvoltage
protection
should
be
agreed
with
the
local
вт
office.
Where
overvoltage
protection
is
required,
this
should
be
achieved
by
fitting
surge
arrestors
type
ВТ
18A
in
the
MDF
‘on the relevant
extension
pairs.
National
Telephone
Systems
9

London 16
installation
Mamas!
3. METER PULSE DETECTION
For lines оп which meter pulse detection is required, me-
tered
outside
line
cards
(see
Figure
6)
should
be
installed.
When
a
metered
outside
line
card
is
installed,
then
a
sig-
nalling
earth
must
be provided
in addition
to the power
protective
earth
(see
Figures
1 and 8).
This
signalling
earth
is
terminated
on
the
system
earth
ter
minal
on
the
external
interface
card
(see
Figure
7).
The
earth
cable
can
be
brought
into
the
unit
via
the
designated
entry
hole
on the left hand
side
of the unit
Figure 6: O/L CARD WITH METER PULSE DETECTION
na
i+ рг
10
National Telephone Systems

installation Manual London
Figure 7: LOCATION OF EARTH TERMINALS
EXTERNAL INTERFACE CARD
2533232:
111
CCU CASE CHASSIS |
SYSTEM
EARTH
POWER
PROTECTIVE
EARTH
National Telephone Systems

London 16 installation Mara!
Figure 8: EARTHING ARRANGEMENT FOR METER PULSE DETECTION
к
КО
ten
Power protacive oath taken vom |
‘eat oortisay conductor on
TSA mans socket
Notes
Earth wires to be minimum 2.5 sq.mm, enclosed in capping, trunking or
some form of mechanical protection (mechanical protection is not
mandatory for signalling earth).
Socket outlet should be surface mounted so that the earth cables enter
through a designated cable “Knock-out”. Flush mounted sockets may be
raised from the wall using a mounting frame (MK part number MK 2133
WHI).
‘The power protective earth is terminated on the “Protective Earth”
terminal on the base of the CCU.
The
signalling
earth
must
be
derived
from
the
main
building
earth
point
or a buried
electrode.
mains
earth must not be used.
The signalling earth should be run via the TJF earth post to the “System
Earth” terminal (TER 1) on the external interface card.
n National Telephone Systems

installation Manual London 16
4. VISUAL INSPECTION AND
PRE-CONNECTION POWER-UP CHECK
1. Ensure that the mains voltage selector is set correctly
(240 V in UK).
2. Ensure that the mains input fuse FS8 is of the correct
value, as follows:
500 mA SloBlo 250 V for 240 V mains
500 mA SloBlo 250 V for 220 V mains
TA SloBlo 250 V for 110 V mains
3. Ensure that the Molex link covers the two pins for
the RAM battery back-up at the lower right hand side
of the motherboard (see Figure 9).
4. Check that the interface cards are securely installed
and that the Molex links on the outside line cards
are set for the correct type of signalling.
5.
Ensure
that
there
is
a
3-Amp
fuse
installed
in
the
13-
Amp
mains
plug,
Figure 9: BATTERY LINK
MOTHERBOARD
National
Telephone
Systems
5

London 16 installation Maral
5. COMMISSIONING CHECKS
Power up the London 16 and carry out the following
checks:
1. On each extension, check:
Internal dial tone
Dialling
Ringing
2.
Seize
each
outside
line
circuit
in
tum,
by
dialling
81
for the first circuit, 82 for the second, etc., and
check that the Line Seized LED operates.
З. Check the battery back-up as follows:
Set up a call diversion from extension 221 to exten-
sion
222
by
dialling
604
222
from
extension
221.
Check that calls are diverted by making an internal
call
to
extension
221;
extension
222
should
ring
with Internal Call cadence.
Switch off the mains power, leave for 1 minute and
switch back on.
Check that calls are still diverted from extension 221
to extension 222.
Cancel the diversion by dialling 605 from extension
221.
4.
Ifan
exchange
line
simulator
is
available,
set
up
an
incoming
call on each
outside
line and check
that
extension
221
rings
for each
line.
м National Telephone Systems

Installation Manual
London 16
6. CALL LOGGING PRINTER PORT
An 252326 interface (via a 25-pin D- type connector) is situ-
ated on the bottom of the unit, to allow connection of a
printer or terminal. This interface uses the following signal
lines:
Pin 3 ---- Transmit data
Pin 7 --- Signal ground
Pin 20 Data terminal ready
Note: Some printers may require other pins to be strapped
together
The printer port incorporates a fuse disconnection barrier
to enable the connection of any compatible printer or ter-
minal. Note that current loop printers should not be used.
Data is transmitted as 7 data bits, one stop bit and with
even parity. The data transmission speed is selectable be-
tween 300 and 9600 Baud using the programming com-
mands shown in Table 1.
Table 1: CODES FOR SETTING PRINTER BAUD RATE
Baud rate Code
9600 19680
4800 19681
2400 19682
1200 19683
600 19684
300 19685
National Telephone Systems 35

London 16 metalation Marea!
7. AUXILIARY PORT
There is а 7:way DIN socket on the bottom of the unit (see
Figure 10), to provide for connection of external features
associated with the options card.
Figure 10: LOCATION OF AUXILIARY PORT
|
DISPLAY PORT AUMILARY PORT PROTECTIVE
EARTH
a © e
w National Telephone Systems