Specifications

VoiceFinder VoIP Gateway Configuration Guide (APOS 2.0) Release Version 3.1
AddPac Technology Co., LTD
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3.3. Numbering Plan, Dialing Operation and Configuring
Dial Peer
3.3.1. Numbering Plan
Configuration of VoIP gateway (or router) starts with setting up an efficient and expandable
numbering plan.
A general telephone network has a hierarchical number structure of (country code) + (area code) +
(prefix number) + (subscriber’s number) and this hierarchical numbering plan is advantageous in
expansion.
Each gateway in VoIP network belongs to PBX of the general telephone network, so set up the
number plan which can be suitable to the size of VoIP network.
When to set the numbering plan, it is important to consider an option whether to configure the
gateway with a gatekeeper.
If the existing gateway is to interoperate with the gatekeeper, the gatekeeper should follow the
pre-defined numbering plan.
The simplest way of number setting is to match with the pre-existing public telephone number of
the location, where the gateway will be installed. This way is advantageous for retrying the call to
the public telephone network, when to interoperate with the other VoIP gateway or when a VoIP
call fails.
Besides this plan, you need to configure a network by setting up a private numbering plan where
private telephone network is deployed.
3.3.2. Configuring Dial Peer
3.3.2.1. Inbound Dial Peer and Outbound Dial Peer
The dial peer can be used for both of inbound and outbound call legs. Please be reminded that
the vocabulary of ‘inbound’ and ‘outbound’ are defined as in a position of the gateway. In other
word, inbound call leg means a call leg directing from the outside of the gateway towards the
gateway, on the other hand, outbound call leg means a call leg directing from the gateway
toward the outside. In case of inbound call leg, the dial peer always should have the setting for
calling number and port destination.
Outbound call leg always should have the dial peer connected to the outbound call leg.