Instellingen
Number format: E.164 (WITH leading + supported on request)
DTMF: RFC 2833
Audio codecs: G.711 A-Law, G.711 μ-Law, G.729Motto voice network: AS49405 (91.212.215.0/24 - 91.236.192.0/24 - 185.47.0.0/22)
Caller ID (always required): P-Asserted-Identity, P-Preferred-Identity, Remote-Party-ID or From (default).
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