This table is deprecated in favour of using ifStackTable.

Implementation of this table was optional. It was designed for those systems dividing a DS3/E3 into channels containing different data streams that are of local interest.

The DS3/E3 fractional table identifies which DS3/E3 channels associated with a CSU are being used to support a logical interface, i.e., an entry in the interfaces table from the Internet- standard MIB.

For example, consider a DS3 device with 4 high speed links carrying router traffic, a feed for voice, a feed for video, and a synchronous channel for a non-routed protocol. We might describe the allocation of channels, in the dsx3FracTable, as follows: dsx3FracIfIndex.2. 1 = 3 dsx3FracIfIndex.2.15 = 4 dsx3FracIfIndex.2. 2 = 3 dsx3FracIfIndex.2.16 = 6 dsx3FracIfIndex.2. 3 = 3 dsx3FracIfIndex.2.17 = 6 dsx3FracIfIndex.2. 4 = 3 dsx3FracIfIndex.2.18 = 6 dsx3FracIfIndex.2. 5 = 3 dsx3FracIfIndex.2.19 = 6 dsx3FracIfIndex.2. 6 = 3 dsx3FracIfIndex.2.20 = 6 dsx3FracIfIndex.2. 7 = 4 dsx3FracIfIndex.2.21 = 6 dsx3FracIfIndex.2. 8 = 4 dsx3FracIfIndex.2.22 = 6 dsx3FracIfIndex.2. 9 = 4 dsx3FracIfIndex.2.23 = 6 dsx3FracIfIndex.2.10 = 4 dsx3FracIfIndex.2.24 = 6 dsx3FracIfIndex.2.11 = 4 dsx3FracIfIndex.2.25 = 6 dsx3FracIfIndex.2.12 = 5 dsx3FracIfIndex.2.26 = 6 dsx3FracIfIndex.2.13 = 5 dsx3FracIfIndex.2.27 = 6 dsx3FracIfIndex.2.14 = 5 dsx3FracIfIndex.2.28 = 6 For dsx3M23, dsx3 SYNTRAN, dsx3CbitParity, and dsx3ClearChannel there are 28 legal channels, numbered 1 through 28.

For e3Framed there are 16 legal channels, numbered 1 through 16. The channels (1..16) correspond directly to the equivalently numbered time-slots.