User`s guide

System Administrator’s Guide – Release 7.2.3.x
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Revised: September 1, 2010
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Port Expander Functions:
Description/View Configuration
– Clicking on the port expander’s Description opens its configuration page.
This allows you to view and modify the configuration.
Delete
– Delete the port expander. All related configurations and port definitions are removed from the
system.
Replace
– This allows the port expander to be replaced by another while automatically transferring all the
configuration parameters and settings to the new unit. This is typically used when replacing a defective port
expander with a new one.
Handsets
– Clicking this link jumps to the Handsets page where port expander FXS ports can be configured.
Outside Lines
– Clicking this link jumps to the Outside Lines page where port expander FXO ports can be
configured.
IP Address
– Clicking on the IP address will open the port expander’s web admin page in a separate browser
window or tab. Use this link to view the port expander’s event log or view/modify its on-board settings.
Reboot
– Clicking this button will reboot the Port expander. Port expanders must be rebooted after
configuration changes are made to the expander or any of its ports. When the button is clicked, the reboot
will start as soon as all of the port expander’s ports are idle.
10.2.1 Port Expander Options
Clicking on the port expander’s Description opens its View Configuration page. This page is used to show
and modify the options for that port expander. To change the configuration, click the Modify
link. Other
options are identical to those on the Port Expanders page.
The following configuration items are listed:
MAC Address
– This is the hardware identifier for the port expander. It cannot be changed.
IP Address
– This is the network address for the port expander. Clicking on it will open the port expander’s
web admin page in another browser window or tab. The IP address cannot be changed.
Description
– This is the name given to the port expander. During plug-and-play installation, the Description
is set to the port expander’s MAC address. Changing it to something more meaningful to the site or
configuration is recommended.
Codec Preference Order
– Sets the preferred codec order for the port expander. The codec is the method of
encoding/decoding the audio sent and received. The two possible codec’s are G.711 and G.729A. G.711
preserves voice quality but takes more bandwidth. G.729A takes less bandwidth but reduces voice quality.
Note: This setting defines the order of codec selection. Not all codec’s are supported for all call types (for
example, accessing the server Auto Attendant requires G.711). The port expander will attempt to use
the first choice but will use whichever codec is required to support calls.