VIP-000
ITG Basic Unit Installation and Reference Guide
Phone Directory Database (Dial Plan)
To allow you to easily dial a telephone or fax on the network, the VoIP gateway maps a series of dialed digits to the IP address of the remote VoIP gateway whose phone or fax you are calling. This mapping information is contained in a database called the dial plan. Each gateway has its own individual dialling plan.
The dial plan for each of the gateways would look like this:
Gateway |
Gateway code |
IP address |
A |
213 |
203.70.147.250 |
B |
805 |
210.243.230.250 |
C |
805 |
210.243.230.250 |
When you dial 805 on one of the phones at the site on the lower left (213), the VoIP gateway will map the 805 to IP address 210.243.230.250 and make a connection to one of the channels on the to VoIP gateway (805).
Making Phone Calls Over the Network
Here is an example application to illustrate phone/fax calls across the network (the VoIP gateway dialling plan):
For this example application, the companys standard telephone system is as follows:
The company wants to match the VoIP dialing plan to the Public Switched Telephone Network area codes. This is to minimize retraining of the users of the companys phone system. With this in mind, the VoIP gateways are configured as follows:
Note: The VoIP gateway provides great flexibility in choosing the dialing plan. This example application is just one way of setting up the dialing plan. Many alternative dialing plans are possible.
For this application, the configurations would be as follows:
Voice Interface Card |
Region Code |
Number of Digits Assigned for Channel |
Strip Off Digits |
Headquarters, Gateway A |
805 | 4 |
First 3 Digits |
Regional Office, Gateway B |
707 | 4 |
First 3 Digits |
Field Office, Gateway C |
415 | 4 |
First 3 Digits |
Warehouse Gateway D |
213 | 4 |
First 3 Digits |
Set the extension phone numbers to group 1, then all the calls to that extension number will go to port 1. Group 2 will go to port 2, and so on and so forth.
Here are some comparisons of the dialling required between calls placed over the public telephone network and calls placed using the VoIP network:
To call from | Using the public telephone network, dial | Using the VoIP network, dial |
Headquarters to the regional office |
9 1 (707) 345-6789 extension 3002 You dial 9 for an outside line, then 1 707 345 6789 to get the PBX operator at the regional office and then ask for extension 3002. |
8 7073002
You dial 8* to get the PBX VoIP line, then dial 707 followed by 3002 to call directly to the extension. |
Regional office to the headquarters |
9 1 (805) 123-4567, extension 2001 You dial 9 for an outside line, then 1 805 123 4567 to get the PBX operator at the headquarters and then ask for extension 2001. |
8 805 2001
You dial 8* to get the PBX VoIP line, then dial 805 followed by 2001 to call directly to the extension. |
Field office to the warehouse |
1 (213) 123-1000 You dial 1 213 789 1000 to call directly to that phone. |
213 1000 You dial 213 followed by 1000 to call directly to that phone. |
Warehouse to the field office |
1 (415) 456-4000 You dial 1 415 456 4000. You call is routed to the first idle line. The call can be answered by anyone sharing the line (who hears the phone ringing). |
415 4000 You dial 415 followed by 4000. Your call is routed to an idle line. The call can be answered by anyone sharing the line (who hears the phone ringing). |
Warehouse to the field office fax machine |
1 (415) 456-4001 You dial 1 415 456 4001 to call directly to the fax machine. |
415 4001 You dial 415 followed by 4001. Your call is routed directly to the fax machine. |
* The 8 is an example PBX configuration parameter. You can configure any number as the PBX VoIP line access code.
Telephone Interface Types
The gateway supports one or more of the following telephone interfaces, depending on the model you have ordered:Hint: This interface type provides power and ringing signals to its interfacing equipment.
Note: It is not intended for connection to the Public Switched Telephone Network.
It recognizes signals and draws current to indicate an active state.
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