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5250 REMOTE EMULATOR CARD
Action: Contact the system operator; he or she might need to IPL
the host. Make sure the host/modem cable is attached
to the emulator. If you can’t find the problem on the
premises at either end, have the telephone company
check the line.
Cause: SDLC encoding not set properly.
Action: The host’s and emulator’s encoding settings must match:
either both NRZ or both NRZI. If you’re unsure what
the host’s setting is, change this setting on the emulator
(see Section 6.2.4) and try to bring it on line again.
Cause: Either host or Card is configured incorrectly.
Action: Make sure the host is configured for the emulator, that
the emulator address is correct at the host, and that the
host configuration and the local configuration match.
Cause: Modem is not the proper type or is not strapped properly.
Action: Verify that both modems are of the proper type for the
network. Make sure the modems can communicate at the
chosen line speed. Check that the modem is “strapped”
for the network type (half- or full-duplex, etc.). Perform
loopback or end-to-end tests to make sure host-site and
emulator-site modems can communicate with each other.
Cause: Host not varied on or subsystem not started.
Action: Vary on the host as described in Section 7.1. Some hosts
require the line, device(s), and subsystem to be varied on
before the host can communicate. Make sure the
subsystem is started.
After you connect the two modems, or when the Card is directly
connected to a host without modems, DCD and DSR should be lit.
Once the host starts polling, the RX LED should flash. If everything
is configured properly, RTS should light, followed immediately by CTS,
followed immediately by TX.
If DCD and/or DSR are not lit, eiter there is a problem with the
configuration of the modem or CSU/DSU, or the cable between the
emulator and the modem or CSU/DSU is defective.