I send Tony end come back to PC just T.
Example:
loop:
Serin PORTC.7, T2400, ReadIn
Serout PORTC.6,T2400,[ReadIn,10,13]
goto loop
Tony consists of 4 bytes. You would need to receive then send 4 bytes.

Serin PORTC.7, T2400, Char1, Char2, Char3, Char4
Serout PORTC.6,T2400,[Char1, Char2, Char3, Char4,10,13]

Or use Serin2/Serout2 with the STR modifier.