Packet Size

The amount of memory (in bytes) used by the workstation for transmission and reception. If a large value is entered, a file is transferred more quickly, but the memory overhead is larger. The default value is 12288. In the case of Telnet3270, you can specify a packet size larger than 8000 bytes by adding the following line to the Telnet3270 stanza in your workstation profile:
SendBufferSize=nnnn