Trendnet VoIP Gateway User Manual

Page of 100
TVP-221H User’s Guide 
55
 
Dial 22203 
(22204)
 
1. Du Du tone is heard 
2. VoIP call processing  
 
Ring back tone is heard 
 
 
 
1. GW A Line 1 LED “ON” 
Phone 203 is ringing 
 
1. GW B Line 3 LED “ON” 
Receiver Picks up phone 
203 
VoIP Conversation 
 
VoIP Conversation 
 
The above dialing process is the same for any calls made from GW A local PSTN to 
remote  phone numbers 203 & 204.    
 
 
L 
 
Case 1-3 Dial Plan samples show the possible analog phone / PBX / 
PSTN integration / applications of the Gateway. Disconnect cadence 
provided by your phone company for your PSTN line and disconnect 
cadence provided by your PBX may require additional matching with the 
gateway.  This will require the assistance of your PBX supplier and / or 
Systems Integrator. Please also see User’s Guide for additional 
information. 
 
5.6  VoIP in a Dynamic IP environment 
The previous section dealt with the TVP-222H in and its configuration in a static 
IP environment. The following section will address the issue of Dynamic IP and 
the TVP-221H deployment in such an environment. This section we will shows 
you how to connect two TVP-221H in a dynamic IP address environment and 
configure PPPoE, DHCP, and DDNS clients. 
 
5.7  PPPoE, DHCP, and DDNS clients: 
 
Case 4:  Gateway Prefix–Simplified Gateway Phone to Gateway Phone 
 
In addition to fixed IP, the TVP-221H can be configured to use PPPoE or DHCP 
clients. With PPPoE and DHCP, you will under most circumstances be assigned a 
Dynamic IP. In order for other people and devices to locate you, they will need to be 
pointed to your dynamic IP. Therefore, it is necessary that you register with a DDNS 
(Note
 is currently the only service supported). Once you have 
registered an account, and have configured the DDNS client in the TVP-221H, the 
TVP-221H will automatically notify DynDNS when your Dynamic IP Address 
changes. DynDNS will in turn, map your Dynamic IP to your registered Domain 
Name. See Chapter 6, DDNS section for more information.