[cisco-voip] destination-pattern "T" question

[Dew Swen]

Well, let me tell u.

Matching occurs digit by digit unless en-bloc is not been configured.

The number is "90114989123456"

When it is press to 9, none of the dial peers are matched.

After 0 is pressed dial-peer 90 is matched beacuse of T parameter which
collects all digits. However, dial-peer 90110 still does not match.

If dial-peer 90 does not exist, dial-peer 90110 matches "after all the 9011
digits are pressed, and another digit is pressed".


On the other hand, if en-bloc is enabled, all digits are sent at the same
time. So 9T and 9011T are being processed at the same time. Because being a
longer prefix, dial-peer 90110 matches.

Hope it is clear.

Regards,
*
-
Dew Swen*


On Tue, Jun 23, 2009 at 12:44 PM, Mehmet Turunc <turunc.mehmet at gmail.com>wrote:

> Hi all,
>
> I was studying Cisco Voice over IP (CVOICE) -Kevin Wallace 2009- and didn't
> understand this example, so I'm confused. Probably a newbee issue:)
>
> Router(config)#dial-peer voice 90 pots
> Router(config-dial-peer)#destination-pattern 9T
> Router(config-dial-peer)#port 0/0/0:23
> Router(config-dial-peer)#exit
> Router(config)#dial-peer voice 90110 pots
> Router(config-dial-peer)#destination-pattern 9011T
> Router(config-dial-peer)#port 0/0/1:23
>
> And the explanation:
>
> The following steps describe what occurs during the call in this example.
> 1. A user wants to call the international number 90114989123456 and starts
> to dial.
> 2. Because the first digit received is a 9, the gateway performs dial-peer
> matching.
> 3. Dial-peer 90 is matched, and any further digits are collected by the
> control character
> T that indicates the destination-pattern value is a variable-length dial
> string. (WHY? why doesnt longest prefix match?)
> 4. The user finishes dialing, and the call is routed using dial-peer 90.
> Dial-peer 90110
> will never be considered.
>
>
> For en bloc signaling, the DNIS is used, so the process is as follows:
> 1. A user wants to call the international number 90114989123456 and starts
> to dial.
> 2. Because en bloc signaling is enabled, the gateway continues to collect
> digits until the
> interdigit timeout value is exceeded.
> 3. The user finishes dialing, and the call is routed using dial-peer 90110.
>
> Thanks for the help
>
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>
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