CONVERTERS RINGING No. 15C
This device can be fitted by the customer as it wired on the customers side of the demarcation point.
Made by Rotadata.
Interconnection directly, or by way of other apparatus, to the port marked "Warning - Connect only approved telecommunications apparatus to this port" with ports not so marked, may produce hazardous conditions on the BT Network and advice should be obtained from a competent engineer.
Under normal mains powered conditions the secondary line jacks connected to the output of the Converter Ringer No. 15C are isolated from the Incoming Exchange Ringing. The ringing current for the secondary line jacks is generated internally by the Unit. All telephones should be connected to the secondary line jacks to overcome any possibilities of "Bell Tinkle".
RINGING EQUIVALENT NUMBER (REN)
Converter Ringer No. 15C REN = 3
INSTALLING THE CONVERTER RINGER 15C
Unscrew the long fixing screw, located at the right hand side of the Converter Ringer and remove the cover.
Utilising the three screws provided, fit the Unit to a suitable location (Fig 1) normally within 3 metres of the Master Line Jack Unit (MLJU) or NTE 5 (Network Terminating Equipment) and not nearer than 50 mm (because of Mains Induction) or further than 2 metres of a 13 Amp Mains Socket.
NB: It may be more advantageous to use utilise normal 8 wire connected to the IDC Connector of the NTE and run to the Converter Ringer rather than the PST Cable provided. This will increase the distance where the Unit can be fitted and more chance of making the position more aesthetic with its surroundings.
Insert the cable through the Converter's casing, strip insulation and connect the four wires to the screw terminals (CN 4) as follows:-
It is recommended that the 8 wire is squeezed between the fingers before inserting in Unit.
Allow sufficient length for the desired cable run and then cut to size. At the Converter Ringer end, strip approximately 0.25" from the outer covering to expose the wire cores. Insert the cable through the Converter Ringer casing and connect it to the 2 wire block terminal CN 3 (this cable is not polarity sensitive). If power cable should need lengthening then a Block Terminal No. 80 may be utilised to extend the Low Voltage AC power feed with normal 8 wire.
The link on CN2 is to the left hand side when in the normal position.
To increase the ringing sensitivity for PBX working move the link on CN2 to the right hand side.
Refit the cover and cover screw to the Converter Ringer. All cables may be cleated if required.
Plug the lead from the Converter Ringer into the NTE 5 MLJU and insert the Power Unit into the mains socket and switch on.
NOTES ON CONNECTING EQUIPMENT TO DIRECT TELEPHONE LINES
Connections to the Telephone Line
Equipment and cabling not provided and installed by the telephone service provider may only be connected to your socket by plugging in direct or, if an NTE 5 is fitted, by wiring to the Customer connection unit (refer to NTE 5 Customer installation instructions).
Care must be taken in bending telephone cables to avoid kinking or other damage.
Equipment must always be placed at least 50 mm (2") from an AC mains socket and must not share wall fixings or back boxes with such outlets.
There must not be more than 50 metres (164 feet) of cabling between your master socket and any extension socket. For similar technical reasons, the total length of wiring, including parallel-connected length, must not exceed 100 metres (328 feet).
Telephone cabling must at all points, be left at least 50 mm (2') from mains electrical cabling, except where a trunking or conduit system is being used, when the telephone cabling must be separated by a divider from any mains electrical cabling in the same trunk or conduit.
Where telephone cabling passes through a ceiling or floor void, it must be fixed wherever necessary, to ensure separation from mains electrical cabling.
It is recommended that telephone cables are fixed about every 300 mm (12'). Positioning
Approved sockets and cables are not designed for use outdoors or
where exposed to undue damp or condensation. For good performance,
installation should be avoided near to:-
Care should be taken to avoid damp conditions in kitchens, toilets
and swimming pool areas. Installation in bathrooms is not