Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 273)

MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
Parameters:
n 0 - $7F, specifying an ASCII character code.
This command selects the character that will force a packet to be sent in Converse Mode.
The parameter n is the ASCII code for the character you want to type in order to force your
input to be packetized and queued for transmission. You can enter the code in either hex or
decimal.
For ordinary conversation, you will probably set SENDPAC $0D and CR ON. This causes
packets to be set at natural intervals, and causes the <CR> to be included in the packet.
If you have set CPACTIME ON, you will probably set SENDPAC to some value not
ordinarily used (say, <CTRL-A>), and set CR OFF. This will allow you to force packets to
be sent, but will not result in extra <CR> characters being transmitted in the text.
SERIALNO n
Mode: CW Default: 0
Parameters:
n=0 - 65535
SERIALNO is useful as a contest QSO number counter. When transmitting a buffer, the
MFJ-1278B scans the buffer text to see if there are any pound sign "#" characters and if it
encounters any then the current value of the SERIALNO counter inserted in the buffer text
being sent. After this value is loaded, SERIALNO is incremented by one until it reaches
65535, where it rolls over to zero.
If for some reason the serial number must be changed during the contest, merely escape to
command mode and enter the new serial number by using the SERIALNO command.