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.
Содержание 748
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Страница 68: ...Operation 54 025 9368H Notes...
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Страница 219: ...Repair 025 9368H 205 MODEL 7XX AUDIO BLOCK DIAGRAM 006 0077A...
Страница 225: ...Repair 025 9368H 211 MODEL 7XX CONTROL BOARD 008 9793D Schematic Sheet 1 of 5...
Страница 226: ...Repair 212 025 9368H MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 2 of 5...
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Страница 228: ...Repair 214 025 9368H MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 4 of 5...
Страница 229: ...Repair 025 9368H 215 MODEL 7XX CONTROL BOARD SCHEMATIC 008 9793D Sheet 5 of 5...
Страница 230: ...Repair 216 025 9368H MODEL 7XX CONTROL BOARD 702 9793D Silkscreen...
Страница 233: ...Repair 025 9368H 219 MODEL 7XX SINGLE E E CARD 008 9794A Schematic...
Страница 234: ...Repair 220 025 9368H MODEL 7XX SINGLE E E CARD 702 9794A Silkscreen...
Страница 236: ...Repair 222 025 9368H MODEL 4XB VOICE CARD 008 9236F Schematic...
Страница 237: ...Repair 025 9368H 223 MODEL 4XB VOICE CARD 702 9236F Silkscreen...
Страница 239: ...Repair 025 9368H 225 MODEL 4XB DIAL CLICK BOARD 008 9242E Schematic...
Страница 240: ...Repair 226 025 9368H MODEL 4XB DIAL CLICK BOARD 702 9242E Silkscreen...
Страница 254: ...Quick Reference 240 025 9368H Notes...
Страница 258: ...Specifications 244 025 9368H...
Страница 259: ...Specifications 025 9368H 245...