ZETRON 748, Техническое руководство

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Programming
92 025-9368H
Wild ANI
The Model 748 supports Wild ANI in the Roamer version. This feature allows users (radios) from
different areas to move or roam around between compatible systems and still have access to mobile
originated interconnect privileges. This is possible by allowing a block or range of sequential ANIs
to access the Model 748 under a single ANI entry in the database. Accounting is possible when used
with the Call Detail option. When a roamer signs on to the system, the actual Access ANI decoded
and allowed on the system is saved in the Call Detail record for that call. This would allow the host
system to forward billing information to the actual user of the system.
An important part of Wild ANI is the ability to exclude specific ANIs or sub-sets of enabled ANIs.
This greatly increases the flexibility and security of the system. The Roamer comes with a large
database to fully support these features.
Wild ANI works by allowing a wildcard or don't care character to be entered into an ANI field. The
Model 748 uses “A” as the wildcard character. Wild ANI can be enabled or disabled in the Mobile
System Menu. Wild ANI is valid in either Access ANI or Disconnect ANI when enabled.
A Wild ANI works like this:
• Access ANI = 1030AAA
• Valid ANI range = 1030000 - 1030FFF (all 16 DTMF tone pairs valid!)
• Valid ANI digits are 0..9, A, B, C, D, *, # (* = E, # = F)
Since the Model 748 supports all 16 DTMF tone pairs you need to look at a range of ANI numbers
as Hexadecimal numbering (Base16) not Decimal numbering (Base10).
Exclusion programming is a means of eliminating or excluding a range of ANIs from being valid in
a system supporting Wild ANI. The ANI decoder scans the database from user number 1 through
user 750 looking for a match. Exclusion is accomplished by finding the disabled or excluded ANI
before the enabled ANI. This works by putting the Access ANI you want to exclude, low in the
database and disabling the user. When that ANI is decoded, access is denied. As the ANI decoder
scans, it MUST find these excluded users FIRST to work with Wild ANI. You can disable deadbeat
customers or sub-sets of a larger Wild ANI block that is enabled.
For Wild ANI to work, the length of the ANI must be fixed. A typical system might use a seven digit
ANI with four digits defining a user group and three digits defining a specific radio. Each user group
would receive a single user (radio) in the database. Any exclusion items for that user group would
precede that user entry. Generally mobiles who roam into a system only originate calls. Setting up
the ability to receive phone calls can be done, but the phone caller would have no way of knowing if
the roaming mobile is within range of the Model 748 at any given time.
To illustrate the concepts described above, we will describe and program an example system.
Our example system for Wild ANI is one site of seven located across the south western corner of a
large Western state. This gives good coverage between two major population centers and the several
smaller towns. In the north western corner of the same state, another operator has a similar system of
nine sites across three population centers. These two operators have a co-operative agreement to
allow each others customers access to a system when in a supported area.