[asterisk-users] Minimum upload speed for Asterisk?

[Frank Tarczynski]

I'm running an Asterisk box that's connected to the world via 5MB 
down/384kB up cable internet service.  I've noticed that the sound 
quality for both IAX and SIP calls sometimes starts to suffer.  IVR 
prompts and MOH frequently have slight pauses from the outside, but 
sound fine from inside calls.

Is 384kB up too slow?

Is there any guidance for the minimum upload speed for an Asterisk box?

Frank