Welltech ePBX-100A-128 - Manual (Page 28)

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„ External IP: If you input External IP, ePBX-100A-128 will take that IP address as its
argument. If ePBX-100A-128 is behind NAT, the SIP header will normally use the
private IP address assigned to the server. The remote device will not know how to
route back to this address; thus, it must be replaced with a valid, routable address.
„ External Host: External Host takes a fully qualified domain name as its argument. If
ePBX-100A-128 is behind NAT, the SIP header will normally use the private IP address
assigned to the server. If you set this option, ePBX-100A-128 will perform periodic
DNS lookups on the hostname and replace the private IP address with the IP address
returned from the DNS lookup.
Note:
•
You should not set both of External IP and External Host together; otherwise there
will be some unexpected problems appeared. That means you can only chose one
for External IP or External Host for “Behind NAT”
„ Local Net: Local Net is used to tell ePBX-100A-128 which IP addresses are
considered local. If one of caller or callee is not under Local Net, ePBX-100A-128 will
set the address in the SIP header that can be translated to that specified by External IP
or the IP address can be looked up with External Host. The format will be IP/ Subnet
Mask. Example: 192.168.1.0/ 255.255.255.0
3.1.2 Feature Code
This page will let user modify feature codes.
„ System Prompt Recording:
User could dial an access code for system prompt
recording, such as **111 for greeting-day.gsm. Before dialing to **111, user should dial