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Host Modes
30 Raven CDMA User Guide for Verizon, version 2.23
The value of S7 (TCP Connection Time-out) specifies the number of seconds to
wait, after initiating a TCP connection attempt, for a successful connection to be
established. If the connection has not been successfully established before the time-
out occurs, ERROR/BUSY is returned.
TCP packet assembly is affected by the values of S50 (PAD Forwarding Time-out)
and S51 (PAD Forwarding Character). Data received in the serial buffer will be
transmitted when the idle inter-character time-out specified in S50 (in tenths of sec
-
onds) occurs or when a character is received that matches S51 (if non-zero).
The TCP session will be terminated if no data is transmitted or received for the time
interval specified in TCPT and TCPS. TCPT is the number of minutes (TCPS=0)
or seconds (TCPS=1) used for this idle time-out.
TCP Auto Answer
TCP auto answer (S0=1|2) also allows a TCP connection request to be "answered"
when the modem is idle, not in a data session. The TCP connection request's desti
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nation port has to match the modem's device port.
Hybrid Modes
Some previous hybrid modes (MD=5, 6) are no longer implemented as special,
unique modes. Now that UDP auto answer (UDP Half-open, S82=2) can be
enabled in conjunction with UDP PAD mode (MD3), effectively this is the same
Caution: TCPT should never be 0 when using the TCP mode. A
broken TCP session can result in the modem being left with a
TCP half-open connection that can only be terminated with a
reset.
Note: UDP auto answer may also be set simultaneously with
TCP auto answer. Then, when in the idle state, the modem will
accept either a TCP connection request or UDP incoming
packet, and enter a TCP or UDP session as appropriate.