AVR-Chat

hi,i wanna to use HM-TRS RF transceiver module,but i have a problem with it, i want to send a packet of data to it.
The packet include 5 bytes,& 60 packets come to RF (HM-TRS)per second,my baud rate is 4800bps.
i read the data sheet of HM-TRS & attach its address for you.

http://www.hoperf.com/pdf/HM-TRS.pdf

you should know this RF module must accumulate  32 bytes for every sending of data.
but the matter is :

has it at 4800bps continous performance or must accumulate 32 bytes?
second state is unpleasant for me because of my data structure.
this matter at its data sheet has not determined obviously.