VoIP Problems with Procurve 3500s

[red-umbrella]

We are having a VoIP issues across 2 Procurve 3500s: a 24-port (branch) and a 48-port (main office).

Intermittently, users complain of not being able to hear those who answer the phones at the site. If you call the site, you can tell the phone has been answered, but you cannot hear anyone for approx. 5 seconds. After that delay, the call is great -- no drops of any kind or static.

I found this forum post which describes the _exact_ same problem on Cisco equipment:

http://www.gossamer-threads.com/lists/cisco/nsp/96713

The solution: enable “fast start” on the router.

I then found the command in our 3500s: “lldp fast-start-count”

Is this the same as that Cisco command? I tried it on our main office 3500, but it did not fix. Yesterday, I tried it on the branch 3500. In both cases, I have set to 1 second (default is 5). It is currently _not_ running on our main office 3500, so it is at 5 seconds.

I know there are other lldp tweaks.

If you can provide any advice that would be great.

[Richard Litchfield]

The Cisco "fast start" sounds more like a spanning tree (STP) setting. The ProCurve equivalent is
spanning-tree admin-edge-port