Promblems with SIP, UC520 behind a Cisco 828 router

[Eivind Jonassen]

Hi,

I have a customer who has a cisco 828 router delivered from his ISP. Behind that router I've connected the UC520 with a global IP adress. We are supposed to use  a SIP trunk ftom a ITSP on the UC520 but are not able to get it up and running. I think it may be a NAT issue since the 828 is in front of the UC520. I'm not very good with NAT at all so any suggestions on how to make it work is appreciated.

Regards

Eivind

[Moderator]

Hi Eivind,

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Thank you,

Cisco Moderation Team

[Eivind Jonassen]

The 828 router had wrong config from SP

Thanks,

Eivind