Cisco UCM twinning?

[CMUK]

Hi Folks

I am very new to Cisco CM and looking to see the best way to twin an external bell to a handset, I felt I was going down a bit of a rabbithole when looking into the "mobility" settings.

I basically just want it so when someone rings this one extension the external SIP bell sounds too. Bell is already registered etc, just the twinning bit I am struggling with.

Any advice would be most welcome

Thanks

 

[nt8d09]

I think you can just build the ATA and add the IP phone's DN to ATA Line 1.

 

[CMUK]

So I have tried that however I get "Partial registered" on my bell and it doesn't ring.

The site is far away and I cannot get into the SIP Bells admin page due to the network config so I am fairly limited.

Is hunt group the only other option?

Avaya just had an "enable twinning" mode! was so easy