An engineer has hundreds of H.323 gateways with thousands of route patterns in a Cisco Unified Communications Manager cluster. The engineer has noticed may specific route patterns created to the H.323

The correct answer is A. regular expressions. CUCM route patterns support wildcard characters and pattern-matching syntax (e.g., X for any digit, ! for one or more digits, [] for ranges) that function as regular expressions. A single well-crafted route pattern using these wildcards can match thousands of distinct dialed numb

Gateway and Dial Plan

Question

An engineer has hundreds of H.323 gateways with thousands of route patterns in a Cisco Unified Communications Manager cluster. The engineer has noticed may specific route patterns created to the H.323 gateways. Which digit manipulation method on route patterns is most effective in reducing the number of route patterns?

Options

Aregular expressions
Bdiscard digits
Cprefix digits
Dcalled-party transform mask

How the community answered

(41 responses)

A
73% (30)
B
5% (2)
C
15% (6)
D
7% (3)

Explanation

CUCM route patterns support wildcard characters and pattern-matching syntax (e.g., X for any digit, ! for one or more digits, [] for ranges) that function as regular expressions. A single well-crafted route pattern using these wildcards can match thousands of distinct dialed numbers, dramatically reducing the total number of route patterns needed. For example, '9.1[2-9]XX[2-9]XXXXXX' can match an entire class of NANP calls. Discard digits and prefix digits modify digits after a match is made but do not reduce the number of route patterns required. Called-party transform masks alter the calling/called party numbers but also don't reduce pattern count.

Topics

#route patterns#digit manipulation#regular expressions#H.323 gateways

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