CalVIP Dialing Plan
Goals:
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Allow user-friendly H.323 dialing within the K-20 educational community in
California by emulating the traditional North American Dialing Plan.
Avoid as much as possible confusing “technology prefixes” that require complex
user instructions.
Allow identification of institution type, e.g., UC, CSU, CCC or K-12, within the
dialing string.
Allow access to other gatekeeper networks such as VideNet.
Methods:
The CalVIP dialing plan will use a ten digit number assignment for devices on the
network that resembles the existing North American Dialing Plan, having a format of
NPA-NXX-YYYY. For the CalVIP implementation, NPA is the current telco area code
that the device resides in. NXX is the prefix used to identify the type of institution. As
detailed below, this will allow the unique identification of the constituency (UC, CSU,
CCC or K-12), the particular institution, organization or campus within that constituency,
and, where needed, the particular sub-organization, such as school district within a
county.
Access to core services, such as centrally supported MCU’s, will retain the same ten digit
format using a unique “area code”, followed by an identifier for the particular MCU and
then a code for the particular conference.
Gateway services that require dialing out onto the PSTN will need to be implemented
using a non-digit identifier to separate the PSTN number from the gateway’s access
number. Outdialed gateway calls are not envisioned to be a major component of
CalVIP’s service.
Implementation:
The proposed dialing scheme below achieves the goals outlined above. Specific details
may require refinement as network engineering proceeds.
Dialing plan assignments using a NPA-NXX-YYYY format:
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NPA The current NADP area code used by an institution where that institutions
gatekeeper is located. This assignment need not change in the future in the event
the telco area code changes.
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NXX The “institutional” identifier. This three digit string uses the N to identify
the constituency and the XX to identify the unique institution within that
constituency. Although the NPA portion of the number serves to segregate
replicated NPA’s, to the extent possible we would like to see unique NXX’s for
each institution statewide. To keep with traditional assignment methodologies, X
should be any digit from 2 to 9 while Y can be any digit from 0 to 9. The
assignments are as follows:
o 2XX Specifies a University of California campus. XX is a unique
identifier statewide. For example 222 could be UCOP and 223 UCB.
o 3XX Specifies a California State University campus. Again XX is a
unique statewide identifier.
o 4XX Specifies a California Community College location. Unique
identification by either 4XX or 5XX prefix code will be attained up to
200 unique locations.
o 5XX Specifies a California Community College location.
o 6XX Specifies a K-12 COE location. Again XX is unique to each COE
statewide. Where a COE might act as a directory level gatekeeper for
districts within that county, then the first one or two digits of the YYYY
portion of the string should be used to identify the district gatekeeper
within that county.
o 7XX Reserved.
o 8XX Reserved.
o 9XX Reserved.
Core functions such as centralized MCU’s should use a unique “area code” such as 800
or 888, followed by a two digit prefix for the particular MCU, and then a five digit
conference code, e.g. 800-42-23456.