H3C Technologies H3C MSR 5600 - Manual (Page 77)

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1. The router first matches a number against the preferred number substitution rule. If they match, the
router replaces the number based on the preferred rule.
2. If the match fails, the router matches the number against other number substitution rules in
sequence. Once a rule is matched, the router replaces the number based on the matching rule and
stops matching other number substitution rules.
Number substitution on the calling router
As shown Figure 26 , the calling router performs number substitution for a number as follows:
1. The router matches the number against global number substitution rules. If a match is found, the
router replaces the number based on the matching rule.
2. If no match is found, the router selects a matching voice entity, and replaces the number based on
the matching rule on the voice entity.
3. The router initiates a call to the called side.
Figure 26 Flow chart for number substitution on the calling router
Number substitution on the called router
As shown Figure 26 , the called router performs number substitution for a number as follows:
1. The router matches the number against global number substitution rules. If a match is found, the
router replaces the number based on the matching rule.
PSTN
Voice interface
Calls the called party
Yes
No
Yes
Global number
substitution rule matched?
Voice entity matched?
Number
substitution rule on the voice
entity matched?
Performs number
substitution
Performs number substitution
Yes
No
No
Call failure