In DBS3900, which of the following single board can provides alarm monitoring interface?

If negotiation mode of UMPT single board FE/GE optical interface on both ends are inconsistent, the optical interface may be down, after a period will resume for auto-negotiation.

Which of the following standard organizations formulate the LTE?

As long as the ANR switch is turned on, the inter-frequency ANR function will take effect even if there is no matching frequency.

An EPS bearer QCI = 4, which of the following statement is correct? (Multiple Choice)