This variable indicates what type of code is being sent across
DS3/E3 interface by the device. (These are optional for E3
interfaces.) The values mean:
ATM_DSX3_SEND_CODE_NONE : Sending looped or normal data.
ATM_DSX3_SEND_CODE_LINE : Sending a request for line loopback.
ATM_DSX3_SEND_CODE_PAYLOAD : Sending a request for a payload
loopback. (i.e., all Ds1/E1s in a
DS3/E3 frame)
ATM_DSX3_SEND_CODE_RESET : Sending a loopback deactivation
request.
ATM_DSX3_SEND_CODE_DS1_LOOP: Requesting to loopback a particular
DS1/E1 within a DS3/E3 frame.
ATM_DSX3_SEND_TEST_PATTERN : Sending a test pattern.