Glad I found this site and think it is great! Kudos. I am a new owner of a UC520 demo kit and after setting up the internal calling to and fro internally I would like to call out and in from the internal network. I am in Texas, and use Time Warner for my ISP via cable modem. Cbeyond goes to alot of the Cisco UC500 training and they look like they have thier stuff together for sure, this being a demo unit though and right now I just want to test the in/out calling I am no willing to setup long term contracts and such. Does anyone have recommendations for SIP Trunk providers. I really liked bandwidth.com however when they learned that my IP is not truely a static IP they stated that they would not allow it. So other than those two, any recommendations I would really appreciate. Thanks! |
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UC500.comCisco Communication Manager Express, UC520, SMB VOIP reference and community |
Hi, the problem with
Hi, the problem with carrying around CME for demo, is that often NAT devices do not process SIP and voice correctly, so you can find that you're able to register and call, but have one-way voice issues.
So either connect CME with a public address, or double check which NAT device they use.
Hi, you can use dyanamic
Hi, you can use dyanamic address with your ITSP if you want, because CME does SIP register to their proxy, so they know your address all the time.
Cisco has never published a list of certified ITSP for use with CME, so we must assume that all do work unless proved otherwise.
Also see other thread of current discussion on the subject.
One more Dynamic IP question
Thanks for the reply pb,
I did not know this about SIP trunks. So if i have this right, I could take my demo kit to a perspective clients, reconfigure the WAN to be able to get out to the Internet using thier ISP info and my UC520 will connect with say the Viatalk (which seems to be the preferred one from the other threads) SIP proxy servers and then call my SIP based phone number on my cell phone and have it ring in the clients office?
The Viatalk 199 deal plus an additional year seems to be a great deal, that comes out to 8 bucks and change per month spread over 24 months.
Thanks,
Rog
The fact that it is a
The fact that it is a dynamic IP isn't the biggest problem (most ITSPs should support dynamic IP). the main problem is that if you plug your UC520 into their existing network, you will get an internet connection and be able to register with your ITSP, but the NAT/Firewall config of their existing router will most likely block the return RTP traffic, creating call issues. The only way to really get it to work would be to setup their router to give you a one-to-one mapping with a public IP and no firewall, or completely unplug their firewall and plug in your UC520, but this would cause more disruption and probably isn't worth it just for a demo. a good option may be to setup a VPN back to your office, then give the UC500 a public IP through the VPN, then calls should work fine. but i've never tried that, good project for my next lab time.
Or what I was planning on doing
Was to carry around an 871 to use in place of the existing customer router. They can be reconfigured for the different WAN technologies in 5 minutes once it is known and have the correct settings for allowing SIP traffic in and out. If they have existing static nats and the such, as long as these are known then adding them to the 871 is easy and can be done onsite quickly. When the demo is done, swap the 871 with whatever they had and away they go as they were before.
That is one way to deal with the unknown of the situation, remove the unknowns as much as possible and replace with 'knowns'!
Thanks both pb and specwars, this is very helpful. Hope to return the favor once i have more time with mine.