CUCM, CUBE & SIP ATA's (PAP2, Sipura, etc) via Internet?

[J. S. Black]

Hello,

A customer is asking me if there is a way to use low-cost SIP ATA's such as the PAP2 to register on a CUCM via the Internet without a VPN tunnel.  Obviously we can make these boxes work directly with the CUCM on the LAN or via a VPN but the customer would like to deploy this like an ITSP would - SIP registration to a public IP address that would connect it to the CUCM.

To me, this is SBC-like functionality... the customer already has CUBE for SIP Trunking but I'm not sure how to approach this on the SIP client side.  Is there a way to do this using the customer's current infrastructure (CUCM 8.5.1, CUBE on ISR running IOS 15.1.4(M5), multiple static IP's on a fiber connection)?  Security is not really a concern as it is for for temporary deployments only.  If SRTP works then it's a bonus.

Thanks

[Leo Salcie Tejeda]

Hi,

Yes it's possible working with port forwarding but not recomended. The best solution should be creating a VPN site to site or at least using SSL VPN.

Regards

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