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To configure basic H.323 parameters, follow these 7 steps:
1 If the V7111 is connected to a router with NAT enabled, perform the following procedure.
If it isn’t, leave the ‘NAT IP Address’ field undefined.
Determine the “public” IP address assigned to the router (by using, for instance,
router Web management). Enter this public IP address in the ‘NAT IP Address’ field.
Enable the DMZ configuration on the residential router for the LAN port where the
V7111 gateway is connected. This enables unknown packets to be routed to the
DMZ port.
2 When working with a Gatekeeper, set ‘Working with Gatekeeper’ field, under ‘H.323
Parameters’, to ‘Yes’ and enter the IP address of the primary Gatekeeper in the field
‘Gatekeeper IP Address’. When no Gatekeeper is used, the internal routing table is used
to route the calls.
3 Leave parameter ‘Enable Annex D/T.38 FAX Relay’ at its default unless your technical
requirements differ.
4 Select the coder (i.e., vocoder) that best suits your VoIP system requirements. The
default coder is: G.723.1 30 msec. To program the entire list of coders you want the
V7111 to use, refer to the V7111 User’s Manual.
5 Map outgoing calls to IP addresses (when Gatekeeper isn’t used) by completing these
steps:
Click the arrow button next to the ‘Tel to IP Routing Table’ label; the ‘Tel to IP
Routing’ screen opens.
Any telephone number whose destination number matches the prefix defined in the
‘Destination Phone Prefix’ field and whose source number matches the prefix defined
in the adjacent ‘Source Phone Prefix‘ field, is sent to the IP address entered in the ‘IP
Address’ field.
Click the Submit button; the ‘Tel to IP Routing’ table is automatically updated.
Click Quick Setup; you’re returned to the ‘Quick Setup’ screen.
For more information on the ‘Tel to IP Routing’ table refer to the V7111 H.323 User’s
Manual.
6 Allocate V7111 endpoints (analog lines) and their corresponding phone numbers to
incoming IP calls by completing these steps:
Click the arrow button next to the ‘Endpoint Phone Number’ label; the ‘Endpoint
Phone Numbers’ screen opens.
Enter the number of a channel, starting with 1, (or a group of channels), under the
‘Channel(s)’ column (for example 1-4 for the first 4 endpoints).
Assign each channel a phone number (for a group of channels, define the first
number in an ordered sequence).
Click the Submit button; the ‘Endpoint Phone Number’ table is automatically
updated.
3Com VCX V7111 Analog Gateway Installation Guide 35