Polycom 1 - Manual (Page 159)

PathNavigator Errors and Q.850 Cause Codes
C - 3
203 Call Rejected The far site system did not accept the call. Check
the calling information and try again.
204 Connection Problem Your call cannot be completed because the
far-end system is not compatible with the H.323
communication standards used by this system.
208 Invalid Address The address you entered is not valid. Check the
calling information and try again.
221 Far Site Busy The system you called is busy. Try the call again
later.
222 Site Not Responding The site you called did not answer. Try the call
again later.
255 ISDN command
processing error The ISDN signaling code has encountered an
error processing an ISDN action. ISDN adapter
busy-wait and retry.
516 Invalid Address The address you entered is not valid. Check the
calling information and try again.
518 Invalid Address The address you entered is not valid. Check the
calling information and try again.
521 Gatekeeper
Problems Your call could not be completed due to
gatekeeper problems. Try the call again later.
531 Invalid Address The address you entered is not valid. Check the
calling information and try again.
534 Gatekeeper
Problems Your call could not be completed due to
gatekeeper problems. Try the call again later.
551 Invalid Address The address you entered is not valid. Check the
calling information and try again.
552 Invalid Address The address you entered is not valid. Check the
calling information and try again.
553 Invalid Address The address you entered is not valid. Check the
calling information and try again.
554 Invalid Address The address you entered is not valid. Check the
calling information and try again.
576 Invalid Address The address you entered is not valid. Check the
calling information and try again.
595 Invalid Address The address you entered is not valid. Check the
calling information and try again.
596 Invalid Address The address you entered is not valid. Check the
calling information and try again.
Code Cause Description