The time period in seconds to wait for an ICMP echo reply
message after an ICMP echo request is sent to the identified
host, see description of icmpEchoReqTable for more details.
The object serves as the second index out of three indices
used when the object icmpEchoReqTime is queried. Note that
this object's value cannot be queried for, this object serves
as an input to the agent itself and a query for this object
makes no sense.