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In both cases, the transmitter uses the smoothed clock.
2.6 OPERATING MODE SELECTIONS
There are two data modes in which the interface passes data and timing:
•
Octet Mode
—This mode preserves the byte integrity associated with
Octet timing. The Octet timing frame is embedded in the data.
Note
Octet timing mode is supported only when two 1082/F modems
are connected to each other. It is not supported when the
1082/F modem is used with the 1092A or 1092ARC modems
from Patton.
•
Clear Channel Mode
—Data is passed at a 64K rate. This does not
preserve the byte integrity associated with Octet timing. Instead, an
Octet timing alarm (on or off) is passed over the modem similar to the
way signaling leads are passed.