SIP authorization id (the device's RC authorization id).
OptionalcodecCodec to negotiate. Defaults to OPUS/16000 (clean wideband PCM16, the least-friction realtime path).
SIP domain (e.g. sip.ringcentral.com).
OptionalignoreSkip TLS cert validation (test/sandbox only — never in production).
SIP outbound proxy (host:port, e.g. sip10.ringcentral.com:5096).
SIP auth password (resolved upstream).
SIP auth username (the device's phone number / extension).
SIP device credentials + codec for one softphone registration. Resolved upstream (MJ credential system / provider
Configuration) from a RingCentral "Other Phone" (BYO-device) registration — never inlined at a call site. Maps 1:1 to the realSoftphoneconstructor options.