Trendnet VoIP Gateway User Manual

Page of 100
TVP-221H User’s Guide 
54 
The above process is the same for Gateway B phone 203 and 204 calls to Gateway A 
phone 201, 800 and 801
.  
 
 
Case 2:  Gateway Phone to PSTN Phone 
 
Gateway B phone 203 calls to PSTN phone A number 7777-1234 
Caller Operation at GW B
Equipment Operation 
Receiver Operation at GW A 
Pick up phone 203 
(204) 
on 
GW B 
1. GW dial tone is heard.
2. GW B Line 3 LED 
“ON” 
 
Dial 01-7777-1234 
 
1. Du Du is heard 
2. VoIP call processing 
 
Ring back tone is heard 
1. GW A Line 1 LED 
“ON”  
2. GW A is connected to 
PSTN 
 
Ring back tone is heard 
1. PSTN call processing  Phone 7777-1234 is ringing 
 
 
Receiver on 7777-1234 picks 
up 
VoIP Conversation 
 
VoIP Conversation 
 
The above dialing process is the same for phones 203, 204 to any GW A local PSTN 
phone number. 
 
Case 3:  PSTN Phone to Gateway Phone  
  
Phone A, number 7777-1234 calling Gateway B phone 203 
Caller Operation at 
Phone A 
Equipment Operation 
Receiver Operation at GW 
B phone 203 
Pick up phone A 
1. PSTN dial tone is heard. 
 
Dial 8888-2222  
1. Call being processed 
2. PBX plays voice greeting