In GPON system, what kinds of bandwidth type are included in the type1 in Tcont type?

The following description, which is correct? MA5600T warning level can be divided into five levels: critical, major, minor, warning and cleared.

(single) A part of the field in the IP packet is used to describe the lifetime of the packet, that is, the TTL value. What is the maximum value?

(single) Is the following description correct? The MA5612 provides a serial port. It supports the external interface cable of CONSOLE and ETH in the normal running phase of the device. It is also used as the maintenance serial port and maintenance network port.

(single) What message does the H.248 Media Gateway send to the MGC to register?