B1 Extension Number Method
Getting Started 63
B1.2 Numbering Plan Example
IP Addressing Information
The following table is a duplication of the table used for the PBX code method.
PBX Numbering Information
The following table contains "VoIP Gateway Trunk (CO Line) Access Number", instead of "PBX
Code" and "TIE Line Access Number" as used in the PBX code method.
Los Angeles
Office
Chicago
Office
Description
Card IP
Address
200.45.11.35 199.176.64.41
Identifies the location of each VoIP Gateway
Card in the network during VoIP
communications. A unique IP address must
be assigned to each card.
Default
Gateway
Address
200.45.11.1 199.176.64.1
Identifies the IP address of the primary
gateway (typically a router or similar device)
that exchanges IP packets with the other
gateways on the VoIP network.
Subnet Mask
Address
255.255.255.0 255.255.255.0
Defines which digits of an IP address are
used for the network address and the host
address at each network location. A card IP
address must fall within the same subnet as
that of the default gateway (e.g., router) that
is connected to the card.
Los Angeles
Office
Chicago
Office
Description
VoIP Gateway
Trunk (CO
Line) Access
Number
802 803
An access number to seize a VoIP gateway
trunk (CO line).
PSTN Trunk
(CO Line)
Number
92 93
An access number to seize a local PSTN
trunk (CO line).
Extension
Number
200 to 299 300 to 399 A number assigned to each extension.
Fax Extension
Number
500 to 599 600 to 699 A number assigned to each fax extension.
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