Are the VVX 411 VoIP phones able to separate number sources? In other words, accept incoming/outgoing calls from provider A (ringcentral) and also provider B (skype for business) - 2 phone numbers from 2 separate sources. All the information I've read defaults to having one provider issue multiple phone numbers (up to 12 separate phone numbers and users). Other answered posts seem to indicate multiple phone sources are not possible, but sighted firmware as the reason.
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