Through SIP RFC3398, many of the response codes used for SIP calls are translations of ISDN codes. For outgoing calls, these can affect the routing through ARS as follows:
Do Not Use This Line Group
The following response codes will cause the system's ARS to no longer target the particular outgoing line group. It depends on other settings whether the ARS attempts to target the call to a different line group or escalate it to another ARS entry.
Code
Cause Code
1
Unallocated Number.
2
No route to specific transit network/(5ESS) Calling party off hold.
3
No route to destination./(5ESS) Calling party dropped while on hold.
4
Send special information tone/(NI-2) Vacant Code.
5
Misdialed trunk prefix.
8
Preemption/(NI-2) Prefix 0 dialed in error.
9
Preemption, cct reserved/ (NI-2) Prefix 1 dialed in error.
10
(NI-2) Prefix 1 not dialed.
11
(NI-2) Excessive digits received call proceeding.
22
Number Changed.
28
Invalid Format Number.
29
Facility Rejected.
50
Requested Facility Not Subscribed.
52
Outgoing calls barred.
57
Bearer Capability Not Authorized.
63
Service or Option Unavailable.
65
Bearer Capability Not Implemented.
66
Channel Type Not Implemented.
69
Requested Facility Not Implemented.
70
Only Restricted Digital Information Bearer Capability Is Available.
79
Service Or Option Not Implemented.
88
Incompatible.
91
Invalid Transit Network Selection.
95
Invalid Message.
96
Missing Mandatory IE.
97
Message Type Nonexistent Or Not Implemented.
98
Message Not Implemented.
99
Parameter Not Implemented.
100
Invalid IE Contents.
101
Msg Not Compatible.
111
Protocol Error.
127
Interworking Unspecified.
Stop ARS
The following response codes end the outgoing call routing and any further ARS targeting of the call.
Code
Cause Code
17
Busy.
21
Call Rejected.
27
Destination Out of Order.
No Affect
All other cause codes do not affect ARS operation.
