Siemens TC12 Installation, Commissioning And Maintenance Handbook page 4

TELECOMMUNICATIONS APPROVAL WARNING
The Siemens 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
Approval Number: NS/1143/2/N/603301
Date: 18/8/92
Integral OTU kit
(677/1/27004/000)
The Modem apparatus is intended for use when supplied with power from a source with
the following characteristics: +5 V (700 mA), +12 V (110 mA) and –12 V (160 mA).
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: +5 V (2.2 A), +24 V (250 mA). 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.
The Integral OTU apparatus is intended for use when supplied with power from a
source with the following characteristics: +5 V (2.2 A), +24 V (250 mA). Ensure that the
power drawn by the Integral OTU together with any other auxiliary apparatus drawing
power from the host lies within the rating of the host power supply.
This apparatus is NOT suitable for connection to the PSTN or to circuits with British
Telecommunications signalling at a nominal frequency of 2280 Hz. It is not intended that
there shall be any DC interaction between this apparatus and British
Telecommunications private circuits, nor does this apparatus use the frequency range
DC to 200 Hz.
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 authorised by STC.
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 Siemens TC12 Instation 667/1/22600/ETC, TC12 Freestanding OTU/LMU
667/1/22670/ETC and TC12 Integral OTU 667/1/21611/100 are CE marked and self
certified to Directive 99/5/EC R&TTE.
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook
Page iv
TC12 OTU/LMU PCB
Approval Number: NS/1143/2/N/603385
Date: 10/11/92
Issue 10