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Connecting your RST310 with a PABX
The RST310 RJ11 port presents as an FXS line, that is it looks like an exchange or
central office line to a standard DTMF telephone attached to the RJ11 analog port.
If instead of a standard telephone, a PABX is connected, then the RST310 is
performing the role of the network trunk as shown below:
Call Progress
Call Progress state
Detects outgoing
call from PBX
Detect disconnect
The RST310 RJ11 default port setting is set to an "International Default" to operate
out-of-the-box with most phones and PABXs available.
Within this International Default the line impedance is set to 600 Ohms and the levels
in the up and downlink directions to suit the expected deployment scenarios.
Specific implementations and terminal equipment may require adjustment of these
parameters in association with your Service Provider.
RST310 INSTALLATION & USER MANUAL
Initiate
incoming call
Progress
state
Signalling
in-call
FXS
Sends ring to PBX
Indicated by
configured
service tones
Detects off-hook
from PBX
Sends dial tone to PBX
DTMF
Detects on-hook
from PBX
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