3com SuperStack 3 NBX Manual De Usuario

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4 Click Remove.

CAUTION: You cannot remove a pretranslator if any device is currently 
using it. If you want to remove the pretranslator, you must first remove all 
devices from the Devices Using Pretranslator list.

The 4ESS protocol, used on T1 Digital Line Cards that are configured for 
PRI operation, requires specific configuration entries in the NBX system 
dial plan. If you purchase the 4ESS protocol and SDN (Software Defined 
Network) service from your long-distance carrier, you must make dial plan 
changes similar to those outlined in 

. If you want to make long 

distance calls or international long distance calls using the 4ESS protocol, 
you must make dial plan changes similar to those outlined in 

 on 

 and  

 

In the NBX system dial plan, if you are using the 4ESS protocol and you 
want to make SDN calls, you must configure a unique route to use for 
SDN calls and include the letters SDN at the beginning of the dial string.

Example: The dial plan entry shown in adds the characters SDN (must be 
capital letters) before the long-distance dialed digits. This example 
assumes that route 4 is used for SDN calls.

Figure 4   Dial Plan Entries for SDN

In the NBX system dial plan, if you are using the 4ESS protocol and you 
want to make long-distance calls, you must remove from the dial string 
any digits that are dialed by users to access the long-distance service. For 
example, if users normally dial 9 and then 1 to obtain a long-distance dial 
tone, and then dial a 10-digit number, the dial plan must remove the 9 
and the 1 and present only the 10-digit number to the long-distance 
carrier. Otherwise, the 4ESS protocol rejects the call.