3Com V7122 User Manual page 82

Phone Context Table Screen
Figure 27
From the 'Add Phone Context As Prefix' drop-down list, select 'Enable' to add the
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received Phone-Context parameter as a prefix to outgoing ISDN SETUP Called and
Calling numbers, if necessary.
From the 'Phone Context Index' drop-down list, select the index number.
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Configure the Phone Context table according to
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Click the Submit button to save your changes.
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To save the changes so they are available after a power fail, see
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Several rows with the same NPI-TON or Phone-Context are allowed. In such a
scenario, a Tel-to-IP call uses the first match.
Phone-Context '+' is a unique case as it doesn't appear in the Request-URI as a
Phone-Context parameter. Instead, it's added as a prefix to the phone number.
The '+' isn't removed from the phone number in the IP-to-Tel direction.
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Table 23.
Saving
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Configuration.