[cisco-voip] right fax sr140 transmission errors

[Matthew Ballard]

A bit late as I was out of the office last week, but we use two different configuration methods, depending on the server.

For our main VMWare infrastructure, we use the Nexus 1000V as the soft switch, with a standard LACP etherchannel from there to our core Catalyst 6509 Sup 720.  Our fax server runs on that, and we haven't had any issues on that.

Our other configuration is for the CallManager infrastructure, in which case we use the standard VMWare soft switch, with dedicated/backup NIC assignments, so that for the most part one VM per NIC in normal operation, but shared for backup.

Matthew


From: Scott Voll <svoll.voip at gmail.com<mailto:svoll.voip at gmail.com>>
Date: Wednesday, September 19, 2012 10:35 AM
To: Eric Pedersen <PedersenE at bennettjones.com<mailto:PedersenE at bennettjones.com>>
Cc: "'cisco-voip at puck. net'" <cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>>
Subject: Re: [cisco-voip] right fax sr140 transmission errors

Just to come full circle......

right fax does have ECM and V.34 settings.  But that was not the problem.  after a night of fun.... 4pm to 4am..... with both right fax support and TAC.  we found that we had to enable T.38 corporate wide, which included both VGWs and all our VG224s.

But that still was not the issue.  we had network issues with vmware.  we could literally go 15 seconds with no packets.  we moved the right fax VM to it's own virtual Nic which fixed that issue. and since then.... we seem to be running clean.

Anyone know how they setup there VM Servers with multiple nics?  do you team them on VM host and on the network Switch?

TIA

Scott

On Wed, Sep 19, 2012 at 8:08 AM, Eric Pedersen <PedersenE at bennettjones.com<mailto:PedersenE at bennettjones.com>> wrote:
Are you using passthrough or relay? Our rightfax is configured for T.38 version 0 and it works well. You can see it in the SIP settings in the Brooktrout Configuration Tool. I don't think our rightfax version even does ECM although I think I read the newer ones do which could also cause problems.

From:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Scott Voll
Sent: 18 September 2012 4:47 PM

To: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: [cisco-voip] right fax sr140 transmission errors

we just moved to a Virtual Right fax with the new virtural SR140 fax board.  Thus we are now doing a SIP trunk to call manager.

we are getting a lot of transmission errors.  anyone have any ideas?  the T1 CAS is coming in on a 3845 with NO controller errors.

I think maybe it has something to do with transmission speed or ECM but does anyone know if you can turn that stuff off?  any other thoughts?

TIA

Scott

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