Trendnet VoIP Gateway User Manual

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TVP-221H User’s Guide 
 
7.  NAT Call Mode: Enables calls from remote sites which use NAT routers 
with private IP networks behind, default is on 
 
8.  Default DTMF Mode: H323 V2 Signal or IMTC. The default is H323 V2 
Signal 
 
9.  DNS IP Address  
 
10. Alternate DTMF IP Address 
 
11. DTMF Duration: default is 300 
 
Gatekeeper 
This page is home to many specific H.323 Gateway / Gatekeeper functions / 
features. For the most part end users will not be using these functions / 
features and / or should use the default settings.  For more information please 
see the Advanced User Manuals or consult with your Systems Integrator  
The primary function of the gatekeeper component is to provide address 
translation services. This function converts external (telephone number) 
addresses and alias (name) addresses to network addresses, allowing users to 
maintain the same telephone numbers or alias addresses regardless of changes 
to their network addresses. 
 
 
 
1.  Gate Keeper Mode: The default setting is off.  This field is to select the 
co-operation mode with some other gatekeeper(s). Three options are 
available: 
i.  Off: Disables gatekeeper co-operation, 
ii.  Auto: Enables auto-discovery of the gatekeeper 
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