
Chapter 24 Dialing plans 219
Networking Configuration Guide
Incoming calls: The Private Dialing Plan provides the special codes that identify the system to
calls coming over private PSTN or VoIP trunks. Calls that do not match the private dialing plan
information, are not accepted by the system.
Calls coming in over private networks or PRI/BRI termination target lines can be set up for each
telephone or group of telephones to which the calls are directed. As with other incoming calls,
these calls can have a public or private call type that matches to a public or private received
number assigned to a target line.
Outgoing calls: Other network codes include the information about public dialing codes that you
enter under Configuration > Telephony > Dialing Plan > Public Networks.
The public dialing plan defines which dialing string prefixes will be allowed over the public PSTN
lines. By defining these dial strings and the length of the prefix, the central office can direct the
calls to the correct public destination.
For private networks, if you are not using routing and destination codes, you need to identify an
access code that indicates an incoming call is destined for the private network.
Public Auto DN 2XX
Private DISA DN 2XX
Public DISA DN 2XX
Variable Example or default settings
Private network ID Number that identifies the system as part of the private network
Location code UDP networks
Private DN length DPNSS systems only
Variable Example or default settings
Private received number <CDP: same as DN of telephone>
<UDP: LOC code + DN>
Public received number <North America: 10 digits XXX-XXX-XXXX, the trailing digits are
the DN>
<DPNSS: maximum number of digits in local dialing pattern>
Variable Example or default settings
Public DN lengths
(prefixes)
Public dialing table
Variable Example or default settings
Private Access Code 6
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