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134 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Cause Values
Normal Class Cause Values
Cause Value (empty)
[ ] -
Normal call clearing (1TR6: AT&T ISDN Protocol)
The call was disconnected normally by either end hanging up.
This Cause Value has end-to-end significance and should always be passed back through the
network to the user.
Cause Value 00
[0x0/0x80] -
Normal disconnect
The call was disconnected normally by either end hanging up. Most equipment uses Cause
Value 16 to report normal disconnect.
Cause Value 01
[0x1/0x81] -
Unassigned (Unallocated number)/
Invalid Call Reference Value (CRV) (1TR6: AT&T ISDN Protocol)
The call could not be completed because the number requested in the SETUP message is not
assigned/allocated by the ISDN network.
This Cause Value has end-to-end significance and should always be passed back through the
network to the user.
65 to 79 Service or Option not Implemented Class Cause Values on page 158
● 67, 68, 71-78, 80 unassigned
81 to 95 Invalid Message Class Cause Values
on page 161
● 92-94 unassigned
96 to127 Protocol Error Class Cause Values
on page 165
● 104-109, 116-126 unassigned
Table 44: Cause Value Classes and Ranges (continued)
Number range Cause Value Class
2 of 2