3Com VCX V7122 SIP, User Manual

Page: 40 / 176

40
3Com VCX V7122/SIP VoIP Gateway User Manual
7
Click the Trunk Group Table button and fill in the Gateway’s active E1/T1 B channels.
For example, to configure four T1 spans, enter 1-96 in the Channels field and starting
phone number, such as 1001, in the adjacent Phone Number field. Phone numbers from
1001 through 1096 are allocated to Gateway channels. Currently, these numbers are
virtual, and they are used only for enabling B-channels. For eight T1 spans, set the
Channel(s) from 1 through 192.
8
When working without a Proxy Server, the internal routing table must be defined. Click
the
Tel to IP Routing Table button and fill in the Destination Phone Prefix field, the prefix
of the called number, and its associated IP address. For detailed information, see “ Tel to
IP Routing Table ”.
9
Go to Advanced Configuration > Trunk Settings menu and select the Gateway E1/T1
protocol type and framing method. (For E1 spans, the framing method should be set
always to Extended Super Frame).
10
Click the Reset button and click OK in the prompt; wait approximately 60 seconds and
refresh the web page.
11
Restore your PC’s IP address and subnet mask to their original values.
12
Using Advanced Configuration and Protocol Management screens you can modify all
SIP and other Gateway parameters. See “
Protocol Definition ” for detailed directions of
operating under Web management control.
BootP/DHCP and TFTP Procedures
If the Gateway IP address is known, you can use a web browser for Gateway configuration
and provisioning. Otherwise, you can use BootP (or DHCP) and Trivial File Transfer Protocol
(TFTP) protocols for initialization and software download.
Each time the VCX V7122 Gateway is powered-on it performs the standard BootP
procedure.
If DHCPEnable = 1 line is included in the Gateway's INI file and if the BootP server was not
found, the Gateway initiates a standard DHCP procedure to configure the Gateway network
parameters (IP address, subnet mask, and default router address). If the DHCP procedure
was used, you need to find the new Gateway IP address allocated by the DHCP server.
Usually this information can be provided by the system administrator.
If the BootP/DHCP server has not been found, the VCX V7122 Gateway starts working from
its internal flash memory.
Usually, the application software already resides in the VCX V7122/SIP flash memory,
therefore there is no need to use the BootP or TFTP procedure. Their download need only
be used to change the VCX V7122/SIP configuration or for a new software upgrade.
The BootP Protocol enables network administrators to manage the configuration of the VCX
V7122/SIP from a central configuration server, as such a BootP/DHCP server.