Definity - DIAL PLAN

Content:

• Dialing plan
• Definity networks

In detalis:

• Dialing plan
  Dialing plan contains instructions related to strings used for building up connections (dialing strings).

  Dialing plan of the exchange can be looked with the "Disp/Change Dial" command:

  

  Parameter	Description	Range of possible values
  North American Area Code:	(it is necessary only in North America)	200
  ARS Prefix 1 Required?	(it is necessary only in North America)	n
  Uniform Dialing Plan:	Switch on/off for UDP UDP Dialing Plan allows for devices of a private network to call each other with dialing number of the same length. Thus there is no difference between local and "interurban" calls in the network.	none, 4-digit, 5-digit
  UDP Extension Search Order:	Searching order of dialing number tables during routingkor	udp-table-first, local-extension-first
  Local Node Number:	Identifier of the local node in the exchange network	1 (1...63)
  ETA Node Number:	Extended Trunk Access Node Number - Identifier of the target node in the exchange network.	1 (1...63)
  ETA Routing Pattern:	Extended Trunk Access Routing Pattern Simultaneous usage of ETA and UDP allows the exchange to forward unknown numbers (access codes) to another (target) exchange, without throwing them away.	Route description table of the target exchange
  First Digit Table	First Digit/Length	extension Here it is not clear, if it is an inner, or an outer one, it decided only in the UDP table. fac - feature access code dac - dial access code (trunk access code) misc blank
  Second Digit Table	(misc)

  Definity private networks

  System has the following functions:
  • - Tandem exchange network element, or terminal
  • - Main and supplementary or tandem exchange
  • - Main or supplementary exchange
  • - Tandem or terminal exchange in a distributed telecommunication system
  • - Operator exchange or supplementary exchange

  There are numerous private networks built from Definity exchanges. They are the following:

  • ETN - Electronic Tandem Network (four-leveled hierarchic network of PNXs)
    many locations, large area
  • DCS - Distributed Communications Systems - a network consisting of 2 or more high performance Definity exchanges.
    several locations, small or large area
  • M/S/T - Main/Satellite/Tributary
    few locations, small area