ZETRON 748, Technical Manual

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iv 025-9368H
TRADEMARKS
Zetron is a registered trademark of Zetron, Inc.
All other product names in this document are trademarks or registered trademarks of their
respective owners.
INDUSTRIAL AND OPERATIONAL WARNINGS
Installation of the Model 748 must be accomplished only by qualified personnel experienced
in telephone, radio communications systems.
WARNING:
The Model 748 requires 12 volt-DC, at 700 ma supplied by the radio station power supply, or
a CE approved 9 to 12 volt-AC source rated at 11 watts. Other usage will
INVALIDATE
any APPROVAL given to this apparatus.
The approval of this interconnect for connection to the British Telecom Public Switched
Telephone Network is
INVALIDATED if the apparatus is subject to any modification in any
material way not authorized or it is used with or connected to:
(i) external control software or external control apparatus which causes the operation
of the interconnect or associated call setup equipment to contravene the
requirements of the standard set out in NTR3.
All apparatus connected to this interconnect and thereby connected directly or indirectly to
British Telecom Private Speachband circuits must be approved apparatus as defined in
Section 22 of the British Telecommunications Act 1984.
The Model 748 is suitable for connection to BT Direct Exchange lines and as an extension to
compatible PABXs which support MF (DTMF) signaling.
This apparatus can be used on circuits which support MF (DTMF) signaling.