Xnet trunking ?

[fonejack]

I’m looking for specs on xnet trunking specifically is there compression on the trunk side and what type of bandwidth consumption per call does xnet use across a network?

 

[tlpeter]

There is no compression by default
By default is uses G711 and when compressed it uses G729
Compression needs DSP resources !!!


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[kwbMitel]

Uncompressed call uses about 100k

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Occam's Razor - All things being equal, the simplest solution is the right one.

 

[fonejack]

Wow, 100k per call that's a bandwidth hog. Has anyone used Xnet with G729? What is the per call bandwidth consumption for G729 and how is the quailty?

 

[Mitelpassion]

quality is great. can hardly hear a difference if any.
bandwidth around 30K.

Need DSP resources (compression DSP card) and compression licenses. Sold in packs of 8 (8 channels)
9th call will not be stopped but will continue using G711

 

[kwbMitel]

I don't think you need compression licenses at all unless the call needs to bridge the E2T barrier. For system to system calls, compression is available without licenses.

If you are running a system where 100K seems like a lot, you may want to rethink your stategy.

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Occam's Razor - All things being equal, the simplest solution is the right one.

 

[Mitelmatt]

kwbmitel is right, if it's IP phone to IP phone across sites then you won't need any extra DSP because the phones are capable of G729.

Where you will need extra compression and dsp is if a trunk or analogue / digital device is involved on one site that you want to transfer to the second

all quite easy to do and works great

You've can use bandwidth management to manage how much bandwidth you use or just but the amount of trunks to the amount of dsp licences so you don't get the instance where a call could go through at G711 if you've run out of licences. Loads of options! :)