Response time with ATA-186

[jhathcock]

I am working with a customer to resolve an issue with voice quality and noticed something peculiar about the ATA-186 gateways- from the local network I am seeing 65-70ms response time to the gateway. Everything else is <10ms like I would expect. After a google search I see a few others mention the same issue. Is this an inherint problem with the ATA-186? Does anyone know of a workaround? In this situation adding that much delay on the LAN segment is pushing them over the edge on round trip time- hence the voice quality issues.

[aamercado]

If you haven't done so already, you can try the following qos commands to see if it helps

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a0080447508.html#wp1043690

[jhathcock]

Thanks, I will give this a try. I'm also going to have the customer replace one of the ATA-186s with an IP phone. If the problem clears up then it proves we have a performance issue with the ATA itself...which is what I am expecting at this point.

[danjorda]

Are you talking about just doing a ping to the ATA? If so from what I understand on these boxes the pings are given a very low processing priority so it does not act quickly on the ping. So it is not really network delay it is the processor lagging.

Dan

[jhathcock]

I'm hearing the same thing from TAC but am still skeptical about the performance of the ATA with voice. I am going to try an IP phone at the location as a test to rule out the network path.