[Asterisk-Users] quad t1 / 1U rack server combos

[William Boehlke]

In our opinion, BAD idea to put four T1s on a single box, unless you have
another box that also has 4 T1s. 
 
When, not if, the board fails, you have to take your box down to replace it.
And as with anything having to do with computers you are guaranteed a
failure at a peak time. 
 
Better to split the load between two boxes. 
 
William Boehlke
Signate
 

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From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Chad Osmond
Sent: Tuesday, August 16, 2005 12:15 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] quad t1 / 1U rack server combos


>From what I understand (From Sangoma's tech support) and having a IBM x306
SCSI system with an A102u I believe that the system will scale up to 4xT1's
easily.
With a full T1 of traffic coming in and playing music on hold, the CPU was
at 7% with no transcoding.
 
Sangoma cards are supposed to place less draw on the interrupts and offer
some new direct writing to DMA in their A104 cards. You may want to give
them a call (Scott or Nenad are the two best people to speak with). 
 
>From Sangoma README.asterisk:
 Voice data is channelized and grouped into  8 byte chunks in HARDWARE.
Each voice   channel is then DMAed directly into the ZAPTEL  buffers.  Thus
there is ZERO copy from HARDWARE  to ZAPTEL, resulting in better performance
and  scalability.
 
 
It sounds to me like that would be once advantage over Digiums cards. They
also have Hardware PRI functions that are passed directly to libpri.
HYPERLINK
"http://sangoma.com/linux/README.asterisk"http://sangoma.com/linux/README.as
terisk
 
Hope that helps.
 
Chad

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From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Damon Estep
Sent: August 16, 2005 12:33 PM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] quad t1 / 1U rack server combos



It is amazing to me at this point that there is not an official Digium list
of supported servers (including 1u models!). Clearly the number 1 issue with
the Digium PRI cards is the server that they are used in.

 

The new cards even go as far as listing server that DO NOT work on the
Digium site!

 

The wiki references are old and do not have any testing parameters.

 

C’mon guys! Certify a few current model servers and be done with it.

 

Without that information I must again ask the question;

 

What 1u server combos work with the new quad pri cards UNDER LOAD (more than
75% channel use). Every user that buys a Digium PRI card should not have to
play hit or miss with 2 or 3 servers that cost more than the card to get it
to work.

 

Please Please Please publish something useful to support the sale of PRI
cards.

 

Damon


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