SPRM

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Further information: Somali People's Resistance Movement

In telecommunications, a Supplemental Performance Report Message (abbreviated SPRM) is used in DS1 transmissions to indicate various conditions. It is a type of Performance Report Message (PRM).

The unused U1, U2, and R bits of a PRM are used in SPRMs primarily to sectionalize circuit failures.

Bit	Description
U1	This bit is used to indicate one or more CRC-6 errors or framing errors were detected since the last SPRM message was sent (by remote unit)
U2	This bit is used to indicate that one or more CRC-6 errors, framing errors, BPVs or EXZs were detected since the last SPRM message was sent (by remote unit).
R	Unknown