User`s manual

Version 5.4 463 May 2008
SIP User's Manual 9. Advanced PSTN Configuration
SIP Response Description
ISDN Release
Reason
Description
415 Unsupported media type 79 Service/option not implemented
420 Bad extension 127 Interworking
480 Temporarily unavailable 18 No user responding
481*
Call leg/transaction doesn’t
exist
127 Interworking
482* Loop detected 127 Interworking
483 Too many hops 127 Interworking
484 Address incomplete 28 Invalid number format
485 Ambiguous 1 Unallocated number
486 Busy here 17 User busy
488 Not acceptable here 31 Normal, unspecified
500 Server internal error 41 Temporary failure
501 Not implemented 38 Network out of order
502 Bad gateway 38 Network out of order
503 Service unavailable 41 Temporary failure
504 Server timeout 102 Recovery on timer expiry
505* Version not supported 127 Interworking
600 Busy everywhere 17 User busy
603 Decline 21 Call rejected
604 Does not exist anywhere 1 Unallocated number
606* Not acceptable 38 Network out of order
* Messages and responses were created because the ‘ISUP to SIP Mapping’ draft doesn’t
specify their cause code mapping.
9.3 ISDN Overlap Dialing
Overlap dialing is a dialing scheme used by several ISDN variants to send and / or receive
called number digits one after the other (or several at a time). This is in contrast to en-bloc
dialing in which a complete number is sent.
The device can optionally support ISDN overlap dialing for incoming ISDN calls for the
entire device by setting the ini file parameter ISDNRxOverlap to 1, or per E1/T1 span by
setting ISDNRxOverlap_x to 1 (where x represents the number of the trunk). For
configuring ISDN overlap dialing using the Web interface, refer to ''Configuring the Trunk
Settings'' on page 96.
To play a Dial tone to the ISDN user side when an empty called number is received, set
ISDNINCallsBehavior = 65536 (bit #16). This results in the Progress Indicator to be
included in the SetupAck ISDN message.