[cisco-voip] MLPP with Location based CAC on CCM 4.13

[Joseph CTR Alan N]

Hello CCM Gurus,

 

            I'm currently having a problem getting MLPP to work across an
ICT when bandwidth within a location has been exceeded. My objective is to
allow a user with access to the "Executive Override" dial pattern preempt a
call in progress from another user in the same location over an inter
cluster trunk when bandwidth within that location has been exceeded.

 

Here's the scenario - I have two CallManager clusters connected via an ICT.
Each CCM supports multiple remote sites connected via low bandwidth (512k)
leased lines. I have the Location based CAC set to 240k to allow up to 10
concurrent calls (G.729) between locations. I have a translation pattern
configured so that executives can dial 92XXXX and receive Executive Override
privilege. This works fine within the same cluster. If Bandwidth has been
exceeded, and the 11th call is placed with the precedence translation
pattern, the precedence tone (very annoying) is played on the most recent
call with lower precedence. If after 30 seconds the party doesn't hang up,
CCM automagically disconnects the call, and frees up bandwidth for caller
#11. 

 

The problem is when I try to use MLPP across an ICT. As precedence bits are
not carried across an ICT, Cisco recommends creating a precedence dial
pattern on the originating cluster, and a precendence translation pattern,
with a PreDot digit discard transformation on the receiving cluster. This
provides the outbound caller precedence on the originating cluster, and the
receiving cluster associates the 92. with the appropriate precedence level
before stripping off the 92 and routing the call to the destination. 

 

 I have everything configured EXACTLY as described in the CCM Features And
Services Guide (Page 363, Chapter 12-11), though I keep getting a "Not
Enough Bandwidth" message on the phone dialing the precedence pattern when
the CAC limit has been reached. I know that my dial patterns and
translation/transformation patterns are correct, as the call goes through
with a precedence ring tone when bandwidth within the location is available.

 



 

 

However, when I attempt to preempt a call in progress from Cluster1 to
Cluster2, I get "Not Enough Bandwidth" on the phone which dialed the
Precedence Route Pattern. 

 



 

I'm guessing this is a Bug within CCM? Any ideas? Again ... the dial pattern
/ translation patterns appear to be correct, as I can place a call from
cluster1 to cluster2 using the 922000 dial pattern when I set the location
bandwidth to unlimited, and the call is routed to the 2000 DN, and it rings
with a precedence ring tone ... 

 

Thanks!!!!

 

Joe

 

Alan "Joe" Joseph III

Marine Corps Network Operations Security Command

Okinawa, Japan

CCNP, CCDP, CSE

josephan at mcbbutler.usmc.mil

 

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