Alcatel-Lucent 9500 MPR User Manual page 97

When the Mode is changed from Presetting to Adaptive Modulation,
the radio defaults to 10 MHz bandwidth at 4 QAM. If the capacity of
the radio (number of E1 lines cross connected) exceeds the available
capacity of a 10 MHz Channel at 4 QAM, Adaptive Modulation will
not enable. It may be necessary to perform one of the following provi-
sioning changes:
1.
Reduce the quantity of E1 lines being transported to meet the required
capacity.
2.
Increase Reference Channel Spacing.
Refer to the CD for Modem Profiles.
Note
4-45