Raven 40710D-600, Руководство пользователя

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CHAPTER 4 OPERATION
Accessing the Public Switched Telephone Network (PSTN) or PABX
Terminals within the service network channel can access the 2-wire
equipment by dialing the DTMF code assigned to the 41675 Switched
Network Interface as programmed on the Address Decoder. This will
activate the 41675 module to the off-hook state. When dial-tone is returned
to the user by the 2-wire equipment, the desired number may be dialed using
DTMF digits.
Accessing the Service Channel Network from the PSTN or PABX
A user may call into the service channel network from the public switched
network by dialing the number of the 2-wire line connected to the 40710D-
600 system. The 41675 Switched Network Interface module will detect ring
voltage on the 2-wire line and automatically activate (go off-hook). The user
will hear at least one cycle of ringback before the 41675 module activates.
When ringback ceases, the 41675 module has answered the call and the
user will hear a brief confirmation tone. The user can then dial the DTMF
code of the desired terminal within the service channel.
Ending a Call
When a call is terminated, one of the users should send the DTMF “#” digit (All
Clear), which will return the 41675 SNI module to the idle (on-hook) condition.
A loop detect circuit is included on the 41675 module which resets the
module to idle when the momentary loss of loop occurs (typically within 30
seconds after the distant end hangs up). A VOX time-out circuit
(programmable for 1 to 15 minutes) is included on the 41675 module to
prevent holding the 2-wire line off-hook indefinitely, in the event the “#” key is
not entered or the distant end fails to reset their 41675 to the on-hook state.
Factory default is set to 1 minute. If no voice energy is detected from the
Service Channel network during the programmed time period, the 41675
module will automatically reset to the idle condition.
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