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TC12 General Handbook

666/HB/43100/000 Page iv Issue 9

TELECOMMUNICATIONS APPROVAL WARNING

The TC12 Modems 667/1/22669/000, 667/1/22668/000 and 667/1/22668/001 and the TC12 OTU/LMU

PCB Assemblies 666/1/02262/001 and 666/1/02262/021 are Approved for connection to British

Telecommunications Private Circuits in a Multipoint or Point to Point configuration as defined in BS6328:

Part 1: 1982, subject to the conditions set out in the instructions for use.

TC12 Modems TC12 OTU/LMU PCB

Approval Number: NS/1143/2/N/603301 Approval Number: NS/1143/2/N/603385

Date: 18/8/92 Date: 10/11/92

The Modem apparatus is intended for use when supplied with power from a source with the following

characteristics: +5V (700mA), +12V (110mA) and -12V (160mA). Ensure that the power drawn by this

modem together with any other auxiliary apparatus drawing power from the host, lies within the rating of

the host power supply. The OTU/LMU is intended for use when supplied with power from a source with

the following characteristics: +5V (2.2A), +24V (250mA). Ensure that the power drawn by the OTU/LMU

together with any other auxiliary apparatus drawing power from the host, lies within the rating of the host

power supply. Other usage will invalidate any approval given to this apparatus if as a result it ceases to

comply with BS6301: 1989.

This apparatus is NOT suitable for connection to the PSTN or to circuits with British Telecommunications

signalling at a nominal frequency of 2280Hz. It is not intended that there shall be any d.c. interaction

between this apparatus and British Telecommunications private circuits, nor does this apparatus use the

frequency range d.c. to 200Hz.

The approval of this apparatus for connection to British Telecommunication Private Speechband circuits

is INVALIDATED if the apparatus is subject to any modification in any material way not authorized by

BABT or its use with, or connected to :-

(i) internal software that has not been formally accepted by BABT.

(ii) external control software or external control apparatus which causes the operation of the modem or

associated call set-up equipment to contravene the requirements of the standard set out in

BABT/SITS/82/01/C.

All apparatus connected to this modem and thereby connected directly or indirectly to British

Telecommunication Private Speechband circuits must be approved apparatus defined in Section 16 of

the British Telecommunication Act 1981.

The TC12 Instation 667/1/22600/ETC is covered by the General Approval for indirect connection of

apparatus under Section 22 of the 1984 Telecommunications Act, Approval no. NS/G/1234/J/100003.

The mark of approval for the TC12 modem must NOT be applied to the Instation as a whole.

TheTC12 Freestanding OTU/LMU 667/1/22670/ETC is covered by the General Approval for indirect

connection of apparatus under Section 22 of the 1984 Telecommunications Act, Approval no.

NS/G/1234/J/100003. The mark of approval for the TC12 OTU/LMU PCB Assembly must NOT be applied

to the TC12 Freestanding OTU/LMU mechanics as a whole.

This Handbook must be supplied with the apparatus. Validity of the approval depends on this information

being supplied including the User Guide in the General Handbook 666/HB/43100/000.

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