Number of Sent BLOCK Messages

This measurement provides the number of BLOCK messages sent from the BSC to the SGSN in a granularity period. The BSC sends a BLOCK message to the SGSN under one of the following conditions:

• The physical links on some Gb interfaces of the NSE are faulty.
• The NSVC is blocked through the OM system.
• The data configuration of the NSVC on the BSC side is not consistent with that on the SGSN side.
• The status of the BSC is not consistent with that of the SGSN.
• The reset is initiated when the Gb interface is blocked.

In a granularity period, the counter is incremented by one every time the BSC sends an NSVC BLOCK REQ message on an NSVC to the SGSN (see measurement point A in Figure 1).