I should have been a little more specific.
The company is Intel, some or all information technology employees are affected, I am not certain as to all or some, seems like it could be just my particular department.
Exempt employees through pay grade 6 are compensated, pay grade 7 and above are not.
Normally the on call phone which belongs to the company is passed from one employee to the next every week.
For those that are eligible a time card must be filled out, if it is not filled out within 2 pay periods there will be no pay only comp time off.
The company has made changes to the process for reporting time (filling out the time card on the company web site) without provide notice to affected employees.
In my case they have me working so hard it is next to impossible to remember to fill out the time card.
I am pay grade 6 and entitled to on call pay.
The on call person is expected to answer the phone or return the call within one hour and to be on site if necessary within two hours to deal with whatever emergency is at hand.
Failure to comply with expectations is grounds for disiplinary action which can lead to termination.
Not all grade 7 employees are required to be on call however grade 7 and above will not receive compensation.
If the situation requires the employee to be on site, the employee could be on site for many hours until the problem is resolved.
Please let me know if there are any other details I should provide.