Verilink 9000 Series (34-00271) Product Manual - Manual (Page 151)

Configuration / Operation 129
J. Do Not Send Device Status. In standard 3270 BSC operation, the unit sends a
device status message when a terminal goes on or offline. If this option is set to
Yes, this operation does not occur. It may be required when connected to hosts that
do not support the device status messages.
CU Type
The CU Type defines the specific Bisync procedure to use for that controller. Valid
entries for this field are as follows.
0 - RMBCS Switch. This is used for some banking transaction switches. It runs
3270 polled Bisync, but does not use general polling.
1 - IBM 3274. This complies with IBM 3274 and 3276 Bisync operation using
general poll.
2 - IBM 3275. This complies with IBM 3275 Bisync operation using general poll.
5 - 3270 LAN Gateway. This is used for Bisync LAN gateways that do not support
specific polling used in the 3274/76 Bisync operation. Only general polling is used.
Selections 3 and 4 are non-polled protocols. The unit port at each end of the link
must be a terminal. ✍