Nortel VoIP Gateway, Руководство по настройке

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38 Configuring the Protocol Definition parameters
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Channel Select Mode Select By Phone Number if you want the VoIP Gateway to select the channel according
to the destination telephone number received in H.225 setup message. This telephone
number is the number you enter in the Phone Number box on the Channels - Hunt Group
screen.
If you are using Hunt Groups, select one of the following four options.
• Select Cyclic Ascending if you want the VoIP Gateway to always select the next
higher channel number in the Hunt Group. When the VoIP Gateway reaches the
highest channel number in the Hunt Group, it will select the lowest channel number in
the Hunt Group and then start ascending again.
• Select Ascending Always if you want the VoIP Gateway to always start at the lowest
channel number in the Hunt Group and if that channel is not available, select the next
higher channel.
• Select Cyclic Descending if you want the VoIP Gateway to always select the next
lower channel number in the Hunt Group. When the VoIP Gateway reaches the lowest
channel number in the Hunt Group, it will select the highest channel number in the
Hunt Group and then start descending again.
• Select Descending Always if you want the VoIP Gateway to always start at the
highest channel number in the Hunt Group and if that channel is not available, select
the next lower channel.
For information about how to enter the Phone Number and Hunt Group ID, refer to
“Configuring the Channels to Hunt Group parameters” on page 58 .
Note: To prevent conflicts, configure the Norstar Hunt Group to start its hunt from the
opposite end of the channel numbers. For example, if the VoIP Gateway starts the hunt
from the lowest channel number, ensure the Norstar starts its hunt from the highest
channel number.
Enable Caller ID Select Yes for this option.
When you select Yes, the Calling number and Display text is sent to the Norstar KSU
between first and second rings.
Caller ID Type Select Bellcore for this option.
Bellcore is the Caller ID Type that is compatible with the Norstar KSU.
Polarity Reversal Select No if you do not want the VoIP Gateway to change the line polarity.
Select Yes if you want the VoIP Gateway to change the line polarity on call answer and
change it back on call release.
The default value is No.
Recommendations:
For use with the Norstar KSU, you must set this parameter to No.
Enable Current
Disconnect Select Yes to generate a Current disconnect pulse of 900msec after a call is released
from IP.
Recommendations:
For use with the Norstar KSU, you must set this parameter to Yes.
Enable Hook-Flash Select No to disable Hook-Flash.
Select Yes if you want the VoIP Gateway to send an H.245 User Input Indication message
when a hookflash is detected.
The default is No.
Send DTMF over H225/
Q.931 Select No for this option.
The Norstar VoIP Gateway uses H.245 to send DTMF out of band (refer to the Enable
DTMF over H.245 option).
Table 4 Protocol Definition parameters (Continued)
Parameter Description