Pretranslators For Incoming Calls - 3Com NBX 100 Administrator's Manual

Pretranslators for
Incoming Calls
Example: Say that the DDI/DID (Direct Inward Dial/Direct Dial Inward)
telephone numbers range from 508-555-4200 through 508-555-4299.
The telephone company sends you the last 4 digits of the total telephone
number. Internally, you want to use extensions 2000 through 2099. You
can define a pretranslator to:
Remove (stripLead) the first two digits of the incoming 4-digit
sequence.
Add (prepend) the digits 20 in front of the remaining 2 digits.
See "Managing Dial Plan Pretranslators"
information and examples on creating and managing dial plan
pretranslators.
For incoming calls, pretranslation reformats the dialed number before it is
passed to the Incoming dial plan table (Table ID 2). See
Plan Table" on page
ID information over incoming VTL calls, see
VTL Calls" on page
Incoming Pretranslator Example 1
If, for an incoming telephone call, the telephone company passes you
4-digit numbers from 6100 through 6199, the system can use a
pretranslator to remove the first digit; the remaining 3 digits can then be
used as internal extension numbers in a 3-digit dial plan. Tell the system
which pretranslations that you want to perform by defining digit
manipulation operations (append, prepend, replace, stripLead, or
stripTrail) within the PreTranslator section of the dial plan configuration
file.
Incoming Pretranslator Example 2
Assume the telephone company passes 10-digit numbers to the system
for each incoming telephone call (for example, numbers in the range
4567-89-3000 to 4567-89-3500). If the system uses 4-digit extensions in
the range 2000 to 2500, you could pass an incoming 10-digit number
such as 4567-89-3210 to extension 2210.
This strategy requires two pretranslation operations: The first operation
performs a stripLead operation to remove the initial 7 digits, leaving 210.
The second operation prepends the number 2 in front of the remaining 3
digits. The result is 2210, which matches an extension within the
extension range. "Sample Solutions Using Dial Plan Configuration File
40. For information on how to properly handle caller
70.
Dial Plan Pretranslators
on page 69 for detailed
"Incoming Dial
"Creating a Pretranslator for
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