MSAN-108 Zarlink Semiconductor, Inc., MSAN-108 Datasheet - Page 11

• Manufacturer Part Number: MSAN-108
• Description: Applications of The MT8870 Integrated DTMF Receiver
• Manufacturer: Zarlink Semiconductor, Inc.

Application Note
satellite, etc.) could be switched, via commands from
the user’s DTMF keypad, into the local repeater.
This would offer the mobile user a variety of paths for
FROM DIGITAL
MT8870
DTMF
RECEIVER
I.D.
DECODE
HORN
SWITCH
USER MOBILE SYSTEM
SWITCH
TRANSCEIVER
FM
MT5089
DTMF
GENERATOR
Features include selective calling, intercommunity RF link and automatic phone patch.
CALL
INDICATOR
PCM DECODER
digital
input
DTMF
KEYPAD
Figure 11 - Interfacing The MT8870 To A Digital PABX Or Central Office
analog
output
CONNECTING
INTER-
Figure 12 - DTMF Controlled Radio Repeater
LINK
AUDIO SWITCHING
(MT8804 CROSSPOINT
SWITCH)
MT8870
DTMF
RECEIVER
LOCAL
REPEATER
COMUNICATIONS
REPEATER
LINK
REPEATER CONTROL SYSTEM
MT5089
DTMF
GENERATOR
communication without the assistance of a human
operator.
Vref
MT8870 TONE RECEIVER
CONNECTING
INTER-
LINK
PHONE
PATCH
MICRO-
PROCESSOR
CONTROL
MSAN-108
USER MOBILE
TO TELEPHONE
EXCHANGE
SYSTEM
TO MICRO-
PROCESSOR
BUS
A-55