10.1 Troubleshooting

 For the most frequently asked questions refer to faq.2n.cz.

  • A separate cable is recommended for each audio unit in a high-interference environment
  • DTMF transmission problem on GSM module > change parameter 710 to 1

  • SIP errors
      1. SIP_ERR_REGISTER_SERVER_ADDR_RESOLVE = 10 (IP address could not be obtained)
      2. SIP_ERR_REGISTER = 11 (general error)
      3. SIP_ERR_REGISTER_FORBIDDEN_ACCESS = 12
      4. SIP_ERR_REGISTER_RCVTIMEOUT = 13
      5. SIP_ERR_INVITE_ADDR_RESOLVE = 20
      6. SIP_ERR_INVITE = 21
      7. SIP_ERR_INVITE_USER_NOTFOUND = 22 (SIP 404 – User Not Found)
      8. SIP_ERR_INVITE_FORBIDDEN_ACCESS = 23
      9. SIP_ERR_INVITE_RCVTIMEOUT = 24
      • In the case of SIP_ERR_INVITE_RCVTIMEOUT, information is added defining the part of the process in which the error happened

/** SIP register states */

SIPCON_STATE_UNREGISTERED = 0,
SIPCON_STATE_REGISTER_AFTER_IPADDR_RESOLVED,
SIPCON_STATE_REGISTER,
SIPCON_STATE_REGISTERING,
SIPCON_STATE_REGISTERED,
SIPCON_STATE_UNREGISTER,
SIPCON_STATE_UNREGISTERING

/** SIP invite states */

SIPCON_STATE_NOINVITED = 100,
SIPCON_STATE_INVITE_AFTER_IPADDR_RESOLVED,
SIPCON_STATE_INVITE,
SIPCON_STATE_INVITING,
SIPCON_STATE_INVPENDING,
SIPCON_STATE_RINGING,
SIPCON_STATE_INVITED,
SIPCON_STATE_HANGUP,
SIPCON_STATE_HANGUPING,
SIPCON_STATE_DECLINE,
SIPCON_STATE_DECLINING,
SIPCON_STATE_INCOMING_INVITE,
SIPCON_STATE_INCOMING_ACCEPT,
SIPCON_STATE_INCOMING_ACCEPTING,
SIPCON_STATE_INCOMING_DECLINE,
SIPCON_STATE_REINVITE,
SIPCON_STATE_REINVITENING,
SIPCON_STATE_REINVPENDING