Network Application; Numbering Plan Example - Panasonic KX-TDA0480 Getting Started

1.2 Network Devices and Numbering Plan
1.2.1

Network Application

QSIG Line Service Interface
QSIG line service allows PBX to support communications with other company members in a
private network where the PBX is included. Implementation of VoIP Gateway Cards provides
a VoIP interface to employ QSIG line service between Hybrid IP-PBXs at different locations by
using IP network instead of conventional telephone networks.
Types of IP Network
The VoIP Gateway Card's quality of performance depends on the type of network in use.
Manageable networks in which static
service compared to unmanageable networks such as the Internet, where quality of service is
not guaranteed.
Examples of recommended IP network
• Digital Leased Line
• IP-VPN
• Frame Relay
Firewall
A firewall protects the internal networks of an organisation against unauthorised penetration
from outside. When routing a VoIP network through a firewall, some performance degradation
may result. If for practical reasons you must route the network through a firewall, refer to "A2
Firewalls" for more details.
1.2.2

Numbering Plan Example

There are 2 methods to plan your numbering system as follows:
PBX Office Code
method
Extension
Number method
This section provides the network numbering mechanism using the PBX Office Code method
(see "A1 Numbering Plan Example Alternative" for the example using the Extension Number
method) based on the previous example diagram. Configure your network referring to this
example.
*1 Dynamic IP addressing (using DHCP/BOOTP) is not supported.
8 Getting Started
*1 IP addresses can be used provide better quality of
In addition to the destination number, the caller dials the unique Office
Code of the PBX to which the called party is connected. Therefore, each
PBX in the network can have the same extension numbering scheme.
That is, for example, each PBX in the network can have an extension
whose number is 201.
The caller dials only the destination number of the called party to call
through PBXs at different locations (hence there are less digits to dial than
with the PBX Office Code method). To employ the Extension Number
method, no 2 PBX can have extensions sharing the same number. That
is, for example, if 1 PBX in the network has an extension whose number
is 201, no other PBX can have an extension with the same number (201).
Not recommended
• Internet
(Delays and loss in data transmission
can cause degradation in speech
quality.)