[asterisk-users] Minimum upload speed for Asterisk?

[John Faubion]

> to suffer.  IVR prompts and MOH frequently have slight pauses 
> from the outside, but sound fine from inside calls.

If the pauses your talking about are at the beginning of the call but are
fine after the call is answered, I'd suspect latency issues. If the pauses
are no longer than just glitches, static or pops then suspect jitter. If the
pauses are longer, and affect IVR, MOH and voice traffic equally, then look
for packet loss. If the voice traffic is fine but the IVR and MOH are
affected, look for I/O bottlenecks in your hardware. Try using My Traceroute
(mtr) to your SIP provider. This may point out packet loss and latency
issues. I say may because ICMP traffic could be handled differently than
SIP/RTP traffic. 

> Is 384kB up too slow?

Depending on the codec used, this should be sufficient for 4 or more
simultaneous calls as long as the latency, packet loss and jitter don't kill
it.
 
John Faubion