ciscoHealthMonTotalDS0 1.3.6.1.4.1.9.10.28.1.2.1.5

The total number of DS0's on a shelf. This is based on the number of T1 and E1 lines present on the router shelf. Total DS0 = (# of T1 lines - 1 * 24) + 23 + (# of E1 lines*30).