Which codec should i choose, What do i need in order to use sip, Unable to register with the sip server – ZyXEL Communications P-2302R-P1 User Manual

Page 115: I can register but can not establish a call

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Which codec should i choose, What do i need in order to use sip, Unable to register with the sip server | I can register but can not establish a call | ZyXEL Communications P-2302R-P1 User Manual | Page 115 / 146