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14-1
TELEPHONE INTERFACE MODULE (TIM)
SECTION 14 TELEPHONE INTERFACE MODULE (TIM)
14.1 DESCRIPTION
The Telephone Interface Module (TIM) connects
the Switch to the telephone lines and handles tele-
phone line protocols. The TIM may be referred to as a
Trunk Interface Module. Refer to page 31 for FCC
regulations.
The TIM logic unit is microprocessor controlled
and communicates to the Call Processor via the intra-
terminal data communication bus. A Switch may have
multiple TIMs with varying styles of telephone lines
attached. The telephone line audio is processed to
interface with the Pulse Code Modulation (PCM)
voice path.
The basic TIM operation functions are as
follows:
1. Supervision
2. Signaling
3. Call Supervision
4. Intra-Terminal Communication
Figure 14-1 DATA BUSES
CIMs CCMs
(NetIDB)
DATA BUS
INTRA-TERMINAL
NETWORK
(NetCSB)
STATUS BUS
CHANNEL
NETWORK
NETWORK
INTERFACE
MODULE
NetNIM
(CIB)
CHANNEL INTERFACE BUS
CONVENTIONAL
CHANNEL
MODULE
INTERFACE
CHANNEL
MODULE
INTRA-TERMINAL DATA BUS (IDB)
(CIB)
CHANNEL INTERFACE BUS
CHANNEL STATUS BUS (CSB)
DISPATCH
MODULE
CHANNEL
DCMs
PSTN OR PABX
TELEPHONE
MODULE
INTERFACE
TIMs
NETWORK
SYSTEM
MODULE
SNMs
SYSTEM NETWORK BUS (SNB)
CALL
PROCESSOR
WIDE
MODULE
AREA
WA Ms
LOGGING
MODULE
ENCODER
LEMs
LOGGING RECORDER
ETHERNET
BUS