Patton electronic SmartNode 4110 Series ユーザーズマニュアル

Call router configuration task list

SmartWare Software Configuration Guide 

port (see 

). Each of these interfaces is responsible for one of the two independent calls. The listener 

port terminates the “FXS call” and the dialer port terminates the “RTP call.”

Figure 72. Bridge services diagram

The listener port interface listens to the FXS interface of the SmartNode for an active FXS–FXO connection. It 
recognizes an active connection by detecting current in the FXS–FXO loop, and the FXS call is established. 
The dialer port interface attempts to make and keep an RTP connection session or call with a dialer port in a 
remote SmartNode. It is called an RTP call. This connection is over the IP network. The listener port and the 
dialer port both try to keep their individual calls up and operating at all times. However if the listener port 
loses its connection (that is, its call), the dialer port does not disconnect its RTP call but remains connected to 
the other SmartNode’s dialer port. Similarly, if the local dialer port loses its connection with the remote Smart-
Node’s dialer port, the SmartNode’s listener port does not disconnect its FXS call but remains connected to the 
FXO device. Though the calls operate independently, they operate over a single data path from end-to-end. 

The dialer port is bound to the Routing Table which is subsequently bound to either an H.323 or SIP inter-
face. The routing table makes the connection to the proper FXS interface.

Listener Port – This port listens for a call from the

FXO device and connects immediately upon

detecting loop current. This is the “Listener Connection.”

Dialer Port – This port “dials” to the

Dialer Port on the other SmartNode to

create the “Dialer Connection”

BRIDGE

Service

Context CS

Routing

Table

H.323/SIP

Interface

FXS

Interfaces

FXO Device,

always off-hook