Cisco Champions 2017

The first time that I heard about the Cisco Champions program, it was back late in November 2015. At that time, I saw the form to submit his application but probably with...
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Migration to collaboration.ksiazek.be

Hello, As announced last week, I'm in the process of the migration of my old blog http://ccievoice.ksiazek.be to the new portal here ( https://collaboration.ksiazek.be)....
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SparkBoard Announcements #LeaveYourMark

Yesterday , it was a Cisco Live Broadcast Event where Rowan has introduced the new product SparkBoard and this is completing the Spark product with whiteboard and still...
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New Things are coming on 🙂

Ok back on trail in 2017 , I really need to revamp my blog 🙂 . This is why I will try to jump again on the blog and begin to publish more things in regards with the...
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Inbound Dial Peer leg matching order

When a voice gateway receive a call , you can divide your call in an inbound and outbound leg. Let’s see how the inbound priority matching . incoming-called-number (called number...

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How to preserve H323 Calls in a WAN failure

During WAN failure , we can observe that H323 will not preserve absolutely the call when the failover occurs as there is no more any signal from the CUCM. An unofficial workaround is to use the...

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RTP Ports

Hi , RTP ports are used on top of UDP to carry on the voice payload/traffic. The common range of ports are 16384 and 32767 .

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Header

Depending the Layer 2 technology that you use , the header can change : Ethernet Frame               => 18 bytes Frame Relay/FRF.12          =>   6 bytes MLP => 6 bytes  13 bytes ATM =>...

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VPN Overhead

Please , don’t forget also that VPN mechanisms add a lot of overhead to your voice packets and it depends also of the technology that you deploy (L2TP for Layer 2 or IPSEC for Layer 3). So as...

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