AT&T 7506 User Manual page 72

Decimal
1
2
3
8
10
A-6 Appendix A — Cause Code Tables
TABLE A-4
Progress Indication Messages
Value
Call is not end-to-end ISDN
Destination address is non-ISDN
Origination address is non-ISDN
Inband information or pattern available
Delay in response at destination interface
EIA Port Text