Patton electronic IP Phone SmartNode 4110 Series ユーザーズマニュアル
Call router configuration task list
511
SmartWare Software Configuration Guide
40 • Call router configuration
CS Bridge service—‘VoIP Leased Line’
The circuit switch (CS) bridge service provides the functional ability to create a leased line between two FXS
ports, with the FXS ports on different SmartNodes. The call is point-to-point in an always connected state, also
known as nailed up. This Call Control service is called Bridge services.”
ports, with the FXS ports on different SmartNodes. The call is point-to-point in an always connected state, also
known as nailed up. This Call Control service is called Bridge services.”
The application for this feature is when a constantly connected VoIP link is required between two FXS ports. It
is as if you connected a regular telephone that is always off-hook to the FXS port. However it is not identical
since the other end of the VoIP leased-line connection does not ring like in a PLAR application. There is no
end-to-end call setup so no call-progress tones are required nor needed.
is as if you connected a regular telephone that is always off-hook to the FXS port. However it is not identical
since the other end of the VoIP leased-line connection does not ring like in a PLAR application. There is no
end-to-end call setup so no call-progress tones are required nor needed.
Here is another way to describe the application. A user has an FXO port in two remote locations and wants to
connect these two locations over an IP network. Clearly the FXO port at a location must connect to an FXS
port. But since the network between the two sites is IP, there needs to be a mapping of the information on the
FXS–FXO link to a method of transporting the information over an IP network. Additionally, you do not
want any ringing to occur when the connection is made; you simply want it to be connected, so the Smart-
Nodes and IP network operate transparently. See
connect these two locations over an IP network. Clearly the FXO port at a location must connect to an FXS
port. But since the network between the two sites is IP, there needs to be a mapping of the information on the
FXS–FXO link to a method of transporting the information over an IP network. Additionally, you do not
want any ringing to occur when the connection is made; you simply want it to be connected, so the Smart-
Nodes and IP network operate transparently. See
to visualize the VoIP leased-line connection.
Figure 71. CS Bridge service—‘VoIP Leased Line’ diagram
Now we will describe the technical details and logical structure to implement this application. From the per-
spective of just one SmartNode, the SmartNode makes two independent calls. These two calls are made from a
logical structure, called a Bridge Service. The Bridge Service has two interfaces, the listener port and the dialer
spective of just one SmartNode, the SmartNode makes two independent calls. These two calls are made from a
logical structure, called a Bridge Service. The Bridge Service has two interfaces, the listener port and the dialer
FXO Device,
always off-hook
IP Connectivity
Routing Table
H.323/SIP
Interface
FXS
Interfaces
Context CS
BRIDGE
Service
FXO Device – always off-hook
FXO Device – always off-hook
ETH 0/0
FXO Device,
always off-hook
H.323/SIP
Interface
FXS
Interfaces
Context CS
BRIDGE
Service
ETH 0/0
Leased Line VoIP Call
Routing Table
Node
Node