[Gabbai]

What is the advanatge, if any, in not specifying a BV proxy and just entering the outbound proxy as: proxy.broadvoice.com?

Another thread mentioned that "the broadband.chi.proxy.com server supports G.711 and G.729 codecs while the other broadvoice proxies do not support the G.729 codec. For someone this might be more important that some other factor. Also the CHI proxy has additional features (selective call forwarding) which some of the other proxies do not yet support." Is there a list of which proxy supports which CODECs?

[jlroberts9914]

Readv this: http://voxilla.com/forum-viewtopic-t-2239.html

Everybody has been chomping at the bit for the CHI proxy to be more stable.

proxy.broadvoice.com only goes to MIA right now but could change.

[Gabbai]

I saw the thread you pointed me to, although most of it is above my head! As a real layman it seems to me that changing to use: proxy.broadvoice.com as my Outbound Proxy is the best solution as then BV will direct me to the most stable proxy, and reliability is a major issue. Is that a correct assumption?

At present my configuration is:

Outbound Proxy: proxy.dca.broadvoice.com
DNS SRV: yes
DNS SRV Auto Prefix: yes
Proxy Fallback Intvl: 1800

Is that 1800 figure too high if I leave dca as the defined proxy [it has the lowest ping]?

[jlroberts9914]

Try this proxy-dca.broadvoice.com which will use DCA first then whatever, MIA I Believe, if DCA is down and back to DCA.

The plain proxy.BV.com resolves to Mia last check.

We are all in the same boat without BV provisioning which I guess resolves proxy to best at every register, but we control the box so hope the two priorities under proxy-dca never go down at same time. :shock:

I am looking into a good solid VPN setup so's I can check it occasionally while I am on the road and/or wifey says phones won't work.

Good I have apots line backup. Cough Cough

Is that 1800 figure too high if I leave dca as the defined proxy [it has the lowest ping]?

Good question I have the same 1800 for register expires but 1 for Prxy Fllbck Intrvl?

[Gabbai]

Digression: one of my biggest problems with VoIP is also what the wife says when there is an echo, delay or worst of all when it just does not workl at all!

[Gabbai]

I have:

Register expires: 3600
Proxy Fallback Intrvl: 1800

Can someone please explain how these two intervals impact on call stability and / or quality, and give advice on how to use the numbers to the best advantage.

Many thanks

[mberlant]

Register expires is the parameter that controls how often your client contacts the SIP server to remind it that the client is alive and well and confirming its current location (public IP address and listening SIP port). The SIP server is supposed to set this timer as part of the reply to each Register command. If the automated setting doesn't work you need to set this parameter manually according to the provider's instruction.

Proxy Fallback Interval is the parameter that controls how often your client checks with your service provider to see which SIP server it should Register with next. For example, if you are homed to BV's chi server and it develops trouble, BV will put instructions in the Proxy Fallback register instructing your client to home to another server, maybe dca or lax.

[Gabbai]

MBerlant, Thanks for your very clear and concise reply. I have another question leading on from what you say. Can BV instruct my home to another server if re-provisioning is off? Is that instruction a function of reprovisioning or a function of the call I make? It seems logical to me that in any event the interval should be shorter rather than longer. Is that a correct assumption or does the function of checking disrupt the stability of the call taking place? Are not the same assumptions also valid for the Registry Expiry figure?

[mberlant]

The Registry Expire feature is part of the interaction between the SIP server and your client, so it should work regardless of your provisioning rules.

I am not sure if Proxy Fallback is dependent upon remote provisioning or not.