- Joined
- Dec 17, 2020
- Messages
- 7
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I have two polycom VVX411 phones on a system with 3 sip trunks.
I’m of the assumption that these phones wouldn’t be able to recognise which trunk a external call comes from to have a different ring for each trunk, but there’s no differentiation between a internal or external call for ringtone.
I’ve read about the alertinfo header as been the method of the phones knowing if it’s an external call, but on a wire shark trace there doesn’t appear that the alertinfo header is been sent from the PBX to the phone.
Is there something I’m missing here in how the PBX deals with alertinfo headers?
I’m of the assumption that these phones wouldn’t be able to recognise which trunk a external call comes from to have a different ring for each trunk, but there’s no differentiation between a internal or external call for ringtone.
I’ve read about the alertinfo header as been the method of the phones knowing if it’s an external call, but on a wire shark trace there doesn’t appear that the alertinfo header is been sent from the PBX to the phone.
Is there something I’m missing here in how the PBX deals with alertinfo headers?