Echo control information
8 7 6 5 4 3 2 1
1 H G F E D C B A
B A Outgoing echo control device information indicator
0 0 No information
0 1 Outgoing echo control device not included and not available
1 0 Outgoing echo control device included
1 1 Outgoing echo control device not included but available
D C Incoming echo control device information indicator
0 0 No information
0 1 Incoming echo control device not included and not available
1 0 Incoming echo control device included
1 1 Incoming echo control device not included but available
F E Outgoing echo control device request indicator
0 0 No information
0 1 Outgoing echo control device activation request
1 0 Outgoing echo control device deactivation request (Note)
1 1 Spare
NOTE - This value will not be generated by the Echo Control Logic defined in Recommendation Q.115.
H G Incoming echo control device request indicator
0 0 No information
0 1 Incoming echo control device activation request
1 0 Incoming echo control device deactivation request (Note)
1 1 Spare
NOTE - This value will not be generated by the Echo Control Logic defined in Recommendation Q.115.