| Access | Type |
|---|---|
| readonly | unknown(0), bits-a(1), bits-b(2), line-slot1-port1(3), line-slot1-port2(4), line-slot2-port1(5), line-slot2-port2(6), holdover-clock-a(7), holdover-clock-b(8), internal-clock-a(9), internal-clock-b(10), internal-sonet-slot1(11), internal-sonet-slot2(12) |