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Practically, it is not possible to implement the spec in an interoperable way. Existing implementations are mutually incompatible. Hence the need for config fla
by MichaelGG 9y ago
Practically, it is not possible to implement the spec in an interoperable way. Existing implementations are mutually incompatible. Hence the need for config flags per "trunk". What one system requires, another will reject. Sad but true.
- zAy0LfpBZLC8mAC 9y agoWell, yes. But still, more often than not, when I encounter interoperability problems, if both sides actually did what the spec says, there wouldn't be a problem. SIP itself is quite sad, but in my experience many implementations are even worse than the spec.