The Carrier to Noise (CNR) threshold. This object
is applicable for modulation profile 2.
Refer to ccsUpSpecMgmtCriteria on how
ccsUpSpecMgmtCnrThres2 can trigger a change
in frequency, modulation or channel width.
A value 0 indicates to bypass the threshold check.
Note: The SNMP SET is rejected if both
ccsUpSpecMgmtCnrThres1, ccsUpSpecMgmtCnrThres2
are non-zero and ccsUpSpecMgmtCnrThres2
is higher than ccsUpSpecMgmtCnrThres1.