Oki BV1250, Installation Manual

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Oki BV1250 Installation Guide APPENDICES
Revision 1.0 Page 275 of 334
The numbering system is used to route voice and fax calls from a network
terminal, through the various devices and agencies in the network, and
ultimately to a destination terminal.
Within the IP network environment (WAN and LAN), this routing is
accomplished by mapping terminal access numbers to the IP addresses of
the various devices making up the network. When outside the IP network
environment, the numbering plan works in the same manner as with more
conventional PSTN and PBX telephone systems.
The elements making up a voice over IP network include; extension
numbers, unit, PBX, and Trunk Group Office Codes, and BV1250 voice
and fax Access Codes.
Below are general discussions of each numbering element. Following
these discussions are some examples from the sample network diagram.
Extension Numbers
Terminal extension numbers are associated with end-point devices such
as telephones and fax machines. In general terminal extension numbers
within the network are assigned using from 1 to 8 digits (including * and
# symbols if desired). Numbers outside the network (e.g. PSTN) follow
the rules for that network (e.g. long distance Access Codes, area codes,
and telephone numbers).
AP/FXS Unit Extensions
In the case of the AP/FXS units shown in the sample network (units
5 and 8), all extension numbers have been configured using the
corresponding port number, 1, 2, 3, and 4. This is convenient
because accessing the extension involves simply dialing the port
number following the units Office Code number and any other
required access numbers. In the case of the Los Angeles office,
extension 1 is addressed within the office by the unit’s Office Code
31 and the extension number 1 (i.e. 31-1).
E&M Unit Extensions
E&M unit extension numbers are usually set up to conform to the
numbering system of the PBX to which the units are connected. In
the sample network diagram, the New York office terminals are
made up of PBX extensions numbered in the 5000s, 7000s, and
100s.