Patent ID: 8238753

Claim:
An optical line terminal that receives an optical signal transmitted by time division multiple access from a plurality of optical network units among which are an optical network unit performing communications at a first bit rate and an optical network unit performing communications at a second bit rate, the optical line terminal comprising: an optoelectric converting unit that converts the optical signal into an electrical signal; a branching unit that branches the electrical signal converted by the optoelectric converting unit, into two electrical signals; a first receiving unit that receives, among the electrical signals branched by the branching unit, an electrical signal having the first bit rate; and a second receiving unit that receives, among the electrical signals branched by the branching unit, an electrical signal having the second bit rate; and a control unit that acquires information concerning the time division multiple access and controls at least one of gain and bandwidth in the optoelectric converting unit, based on the information concerning the time division multiple access.