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I have a pair of Cisco 3725 routers that I'm talking through
using VOIP. I measured a mouth to ear delay of 70ms with a standard config. Is this what I should be getting? Is there a way to make the delay 0? bob@coolgroups.com |
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#2 |
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<> wrote in message
news: oups.com... >I have a pair of Cisco 3725 routers that I'm talking through > using VOIP. I measured a mouth to ear delay of 70ms with a > standard config. Is this what I should be getting? Is there a way > to make the delay 0? > Are they connected by LAN or WAN? What codec and packetization period are you using? What type of voice terminal are you using? |
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#3 |
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LAN,
G.711 ulaw 20ms, standard POTS phone R-Guy wrote: > <> wrote in message > news: oups.com... > >I have a pair of Cisco 3725 routers that I'm talking through > > using VOIP. I measured a mouth to ear delay of 70ms with a > > standard config. Is this what I should be getting? Is there a way > > to make the delay 0? > > > > Are they connected by LAN or WAN? > What codec and packetization period are you using? > What type of voice terminal are you using? |
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#4 |
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Posts: n/a
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<> wrote in message
news: oups.com... > R-Guy wrote: >> <> wrote in message >> news: oups.com... >> >I have a pair of Cisco 3725 routers that I'm talking through >> > using VOIP. I measured a mouth to ear delay of 70ms with a >> > standard config. Is this what I should be getting? Is there a way >> > to make the delay 0? >> > >> >> Are they connected by LAN or WAN? >> What codec and packetization period are you using? >> What type of voice terminal are you using? > > LAN, > > G.711 ulaw 20ms, > > standard POTS phone With 20ms packetization, it will be impossible to get less than 20ms delay, because that's how much data the gateway has to collect before sending a packet. There's also typically 10-20ms burned in the codec/DSP's pipeline. On top of that, the receiver's jitter buffer will add a few tens of ms; most jitter buffers, even adaptive ones, are tuned with a minimum of a few tens of ms because it doesn't hurt, and 40ms or so of buffering will hide all but the worst unless you have no QoS at all over a skinny WAN pipe. 70ms isn't bad, and no human should ever notice it. Don't worry about latency until it hits 150ms. S -- Stephen Sprunk "Stupid people surround themselves with smart CCIE #3723 people. Smart people surround themselves with K5SSS smart people who disagree with them." --Aaron Sorkin *** Posted via a free Usenet account from http://www.teranews.com *** |
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