1 Call in progress
100 Connecting
180 Ringing...
181 Call forwarded
182 in waiting queue
200 OK
300 Several possibilities
301 Permanently forwarded
302 Temporarily forwarded
380 Different service
400 Wrong number Aufruf
401 Not authorised
402 Payment necessary
403 Not permitted
404 User not found
405 Method not allowed
406 Not acceptable
407 Proxy-Authentification necessary
408 No Answer
409 Conflict
410 No longer reachable
411 Length necessary
413 Message too long
414 URI too long
415 Media type not supported
420 Wrong ending
480 Not reachable at this time
481 User doesn't exist
482 Loop detected
483 Too many "hops"
484 Wrong address
485 Ambigous
487 General fault
500 Server-Fault
501 Not implemented
502 Wrong Gateway
503 Service not reachable
504 Exceeding time with Gateway
505 SIP-Version is not supported
600 Busy
603 Given
604 Doesn't exist
605 Not acceptable
COMILFON Softphone is a virtual telephone device, with which one can ... 
