There’s a ton of
documentation/examples out there on the interweb about how to use IOS voice translation rules so
I’m not going to try to repeat them. Instead, I’ll show one
interesting use-case that took me a bit to figure out.
So, the scenario here
is implementation of seven-digit dialing for the local area code.
I want to append “719” to any seven-digit out dialed number. For
ten-digit out dialed numbers, I want to leave them as is.
Here’s how to do it,
building up from the basics:
rule
1 /\(..........\)/ /\1/
Rule 1 is ‘matching’
on any ten-digit number, keeping all the matched digits, then copying
them all to the replacement number. That solves the “leave them as
is” problem with ten digit dialing.
rule
2 /\(.......\)/ /719\1/
Rule 2 is matching on
any seven-digit number, keeping those matched digits, then appending
“719” on to those kept digits in the replacement number. That
effectively provides the seven digit dialing functionality for 719
area codes.
Now we put these rules
into a translation set:
voice
translation-rule 2
rule
1 /\(..........\)/ /\1/
rule
2 /\(.......\)/ /719\1/
A ten-digit number gets
matched first (since that’s precedence 1) and left alone. Rule
processing stops. Seven digit numbers fall to the next rule and get
the area code appended.
Last steps:
- Put the rule into a
translation profile
voice
translation-profile addareacode
translate
called 2
- Apply the profile to
a dial peer in outgoing mode:
dial-peer
voice 150 voip
translation-profile
outgoing addareacode
destination-pattern
.T
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