11.1 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, = 1
SIPCON_STATE_REGISTER, = 2
SIPCON_STATE_REGISTERING, = 3
SIPCON_STATE_REGISTERED, = 4
SIPCON_STATE_UNREGISTER, = 5
SIPCON_STATE_UNREGISTERING = 6

/** SIP invite states */

SIPCON_STATE_NOINVITED = 100,
SIPCON_STATE_INVITE_AFTER_IPADDR_RESOLVED, = 101
SIPCON_STATE_INVITE, = 102
SIPCON_STATE_INVITING, = 103
SIPCON_STATE_INVPENDING, = 104
SIPCON_STATE_RINGING, = 105
SIPCON_STATE_INVITED, = 106
SIPCON_STATE_HANGUP, = 107
SIPCON_STATE_HANGUPING, = 108
SIPCON_STATE_DECLINE, = 109
SIPCON_STATE_DECLINING, = 110
SIPCON_STATE_INCOMING_INVITE, = 111
SIPCON_STATE_INCOMING_ACCEPT, = 112
SIPCON_STATE_INCOMING_ACCEPTING, = 113
SIPCON_STATE_INCOMING_DECLINE, = 114
SIPCON_STATE_REINVITE, = 115
SIPCON_STATE_REINVITENING, = 116
SIPCON_STATE_REINVPENDING = 177