7.12.4 Remote Pbx Extension Between Fxo And Fxs Devices - AudioCodes MediaPack MP-124 User Manual

SIP User's Manual
2. For the second device (10.2.37.20), in the 'Endpoint Phone Number Table' page,
assign the phone numbers 201 to 204 to the device's endpoints.
Figure 7-7: Assigning Phone Numbers to Device 10.2.37.20
3. Configure the following settings for both devices:
In the 'Tel to IP Routing' page (refer to ''Tel to IP Routing Table'' on page 156), add
the following routing rules:
a. In the first row, enter 10 for the destination phone prefix and enter 10.2.37.10 for
the destination IP address (i.e., IP address of the first device).
b. In the second row, enter 20 for the destination phone prefix and 10.2.37.20 for
the destination IP address (i.e., IP address of the second device).
These settings enable the routing (from both devices) of outgoing Tel-to-IP calls that
start with 10 to the first device and calls that start with 20 to the second device.
4. Make a call. Pick up the phone connected to port #1 of the first device and dial 102 (to
the phone connected to port #2 of the same device). Listen for progress tones at the
calling phone and for the ringing tone at the called phone. Answer the called phone,
speak into the calling phone, and check the voice quality. Dial 201 from the phone
connected to port #1 of the first device; the phone connected to port #1 of the second
device rings. Answer the call and check the voice quality.

7.12.4 Remote PBX Extension Between FXO and FXS Devices

Remote PBX extension offers a company the capability of extending the "power" of its local
PBX by allowing remote phones (remote offices) to connect to the company's PBX over the
IP network (instead of via PSTN). This is as if the remote office is located in the head office
(where the PBX is installed). PBX extensions are connected through FXO ports to the IP
network, instead of being connected to individual telephone stations. At the remote office,
FXS units connect analog phones to the same IP network. To produce full transparency,
each FXO port is mapped to an FXS port (i.e., one-to-one mapping). This allows individual
extensions to be extended to remote locations. To call a remote office worker, a PBX user
or a PSTN caller simply dials the PBX extension that is mapped to the remote FXS port.
This section provides an example on how to implement a remote telephone extension
through the IP network, using 8-port FXO and 8-port FXS devices. In this configuration, the
FXO device routes calls received from the PBX to the 'Remote PBX Extension' connected
to the FXS device. The routing is transparent as if the telephone connected to the FXS
device is directly connected to the PBX.
Version 5.4
Figure 7-8: Routing Calls Between Devices
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7. IP Telephony Capabilities
May 2008