NEC 28i System Manual page 86

1201 - DCI Setup
DCI S-Registers (Register Type 1) (cont'd)
Register
Clear to Send (CD)
Control
Enables (0) or disables (1)
CTS (pin5) control. If dis-
abled, CTS follows RTS
(pin 4). For PMS, always
enable this option (0).
Flow Control
Sets flow control. For
PMS, be sure to disable
flow control (0).
Internal Calls
1 T1 Timer
After the DCE (DCI) sends
a packet, it must receive a
response from the connect-
ed DTE within the T1 inter-
val. If a response is not
received, the DCE resends
the packet.
2 T2 Timer
After the connected DTE
receives a packet from the
DCE, it must respond with-
in the T2 interval. (T2 must
be less than T1.)
3 N1
The maximum number of
bits in an I (Information
Transfer) frame
4 N2
After T1 expires, N2 is the
maximum number of trans-
mission and retransmissions
of a packet allowed.
3-28
Description Range
0 = Control
enabled
1 = Disabled (fol-
lows RTS)
0=No flow control
1=RTS/CTS (hard-
ware) flow control
enabled
2=XON/XOFF
between DCI and
connected terminal
3=XON/XOFF
between sender
and receiver (DCI
transparent).
0-65535 mS
0-65535 mS
0-65535 bits
0-65535 times
Default
0 (control
enabled)
1 (hardware
flow control)
500 mS
250 mS
2080 bits
20 times