Polycom VSX Series Manual De Usuario

Administrator’s Guide for the VSX Series

3 - 30

Select 

 to go to the Preferred Speeds screens and configure these 

settings:

Select 

 to go to the Call Speeds screen and specify the call speeds to 

make available to users, if you are allowing them to choose speeds on a 

call-by-call basis.

If the call type on the home screen is set to a specific call type, the system does 

not attempt to place the call using a different call type, even if other types are 

listed in the Dialing Order.
You can configure the VSX system so that users can choose to place IP-to-ISDN 

or ISDN-to-IP calls through a gateway.

Make sure the system is registered with a gatekeeper.

Go to System > Admin Settings > Network > Call Preference and select 

Enable ISDN Gateway.

If you want to allow users to place IP-to-ISDN calls through a gateway 

when calling from the directory, do one of the following: 
— On the Network Dialing screen, set Preferred Dialing Method to 

Auto and select ISDN Gateway as the first choice under Dialing 

Order. With this configuration, calls placed from the directory will be 

placed through a gateway first if an ISDN number exists. 

— On the Network Dialing screen, set Preferred Dialing Method to 

Manual. With this configuration, users can select ISDN Gateway 

from the list of call types that appears when placing a call from the 

directory.

Determines the speeds that will be used for calls from this 
system when:
•

Call Quality is set to Auto on the home screen and 
Directory screen, or

The Call Quality setting is not available for users.

If the far-site system does not support the selected speed, the 
system automatically negotiates a lower speed. 

Allows you to restrict the bandwidth used when receiving 
calls. 
If the far site attempts to call the system at a higher speed 
than selected here, the call is re-negotiated at the speed 
specified in this field.