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Zyxel PK5000Z QOS

For 2. Reserved Bandwidth speed. Make that 1536 instead of 512 and see would that help.

You don't think 512k would be adequate for VIOP? What would you recommend for my upload reservation? I only have 896k.

Try 1536 download, and 256 upload
if that doesn't seem to work try:
2048 download and 384 upload

reply to Rexter
Did it work?

It does seem to be working better at the moment. I need to use it for a while, as the issue was intermittent. Any word on what that TOS bit value setting is about?
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I'm with the Central Government. I'm here to help you. Now bend over, really, I'm helping you, just, just stay still. You'll feel better in a moment.

TOS Bit stands for the "Type of Service" bit.

Within the ethernet packet, a TOS bit can be embedded that tells what priority should be given to this packet.

With respect to Outbound settings, if the networking equipment on the outside of your network also respects TOS Bits, then it would prioritize your traffic according to the priority set.

For example, if your VoIP traffic is set at priority 7, but your email traffic was set with priority 1, VoiP traffic would be prioritized.

Now in reality, I think you are going to find that the internet in general does not respect QoS or TOS settings. Once your packets enter the big bad internet, the TOS would essentially be ignored.

Since the page you are showing is with respect to Downstream traffic, you would need equipment on your local network that respected the TOS bit. Chances are, you are using a simple switch that does not respect the TOS bit and therefore traffic within your LAN is not being prioritized. This is not an issue though, since you have plenty of bandwidth on your local network.

Also, each VoIP call needs approximately 128k of bandwidth in each direction. If you ever think you will have two concurrent calls, I would recommend reserving 256k in each direction for VoIP.

I was reserving 512k, and it wasn't working.

reply to gweidenh
So is the TOS bit set by the router then?

I noticed on your screendump that you are setting downstream QoS, but putting your local NetTalk machine/device as a source. Shouldn't it be the other way around? For downstream QoS your SOURCE=ANY and DESTINATION=NetTalk and for upstream QoS the other way around.

That's a very good point! I though source, meant local, and destination meant cloud. Can someone confirm?

You will want to configure both Upstream (outbound traffic to the internet) and Downstream (Inbound traffic to your device).

reply to Rexter