The test is performed by the active Common Logic card. The result will be a sum of 2**n according to the following bit convention: For DXC: bit 0 Database 1 Checksum Error (LSB) bit 1 Database 2 Checksum Error bit 2 I/O Expander Error bit 3 Counter Error bit 4 Matrix DPR Error bit 5 PS-A 5 Volt Error bit 6 PS-A 12 Volt Error bit 7 PS-B 5 Volt Error bit 8 PS-B 12 Volt Error bit 9 EPROM Failure

For FCD: bit 0 I/O Expander Error (LSB) bit 1 Counter Error bit 2 EPROM Failure bit 3 Illegal Sys Config bit 4 SFIFO bit 5 EPIC Failure (ISDN) bit 6 XL Flash Fail -- for MSDSL interface bit 7 XL MITEL Fail -- for MSDSL interface bit 8 XL Framer Fail -- for MSDSL interface bit 9 XL DSP Fail -- for MSDSL interface

For LRS52 - refer to product's spec

When a bit is ('1'), the error exists. When NO ERROR is encountered, this object's value will be 0.