This read-only value, in octets per hour, reports the GPRS QoS mean data rate actually negotiated with the network as the connection's granted sustained throughput. An admin compares this to the requested mean rate to verify the carrier is honoring the expected average bandwidth for ongoing traffic over the cellular link. For example, if a site depending on cellular as primary WAN sees this negotiated mean rate well below what was requested, the admin knows sustained throughput will be lower than planned and may need to escalate with the carrier.