[cisco-voip] IOS 12.3-11(T5) echo-cancellation bug?

[Denis V. Schapov]

Hi.

Look at 

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/int_c/vpcg/ch7_nxtp.htm
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_serv/as5400/sw_conf/nxtprtrn/gtvctune.htm
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_4/gtvctune.htm

and you will get the answer.
Summary: it depends on nextport spe firmware running. New nextport firmware implements new ecan improvements which cause the minimizing maximum echo tail length. You can use maximum 64ms or downgrade spe firmware to use 128ms if it really needed.

Denis.
  ----- Original Message ----- 
  From: Brett Thomson 
  To: cisco-voip at puck.nether.net 
  Sent: Wednesday, June 01, 2005 3:06 PM
  Subject: [cisco-voip] IOS 12.3-11(T5) echo-cancellation bug?


  Has anybody tried this IOS (c5400-ik9s-mz.123-11.T5)  I have, and noticed that there is not a '128ms' option when setting echo-cancellation coverage?

  The available options are 16, 32, 64 & 8 (in that order - seems odd, I know:)

  Is this a bug?  Is the 8 option actually meant to be the 128ms option?

   

  T.I.A

  Brett Thomson

   



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