Troubleshooting Terminal, Printer and Serial Device Connections - Edition 4 (32022-90030)

140 Glossary
Glossary
NMMGR interface is presented,
and defaults of configurable
values are used automatically.
H
handshaking A
communications protocol
between devices or between a
device and the CPU. Provides a
method of determining that each
end of a communications link is
ready to transmit or receive data,
and that transmission has
occurred without error.
hardware handshake Uses
modem signals CTS and RTS to
pace the data transfer from the
DTC to the attached device. (For
DTC 72MX only.)
hop count See internet hop
count and intranet hop count.
host-based network
management A method of
managing asynchronous
communications for HP 3000
Series 900 computers. All of the
control software is configured on a
single MPE/iX host and is
downloaded to the DTCs that are
managed by that host. With
host-based management, a
permanent relationship exists
between each DTC and the host.
Terminal users can access only
the single MPE/iX system that
owns the DTC their terminal is
connected to.
host computer The primary or
controlling computer on a
network. The computer on which
the network control software
resides. For HP purposes, it can
also be used to distinguish the
MPE/iX system (host) from the
DTC.
HP block mode A block mode
transmission method employed
by HP computers where the
system controls the block mode
handshake. When HP block mode
is used, the user program need
not concern itself with data
transfer protocol.
HP ARPA Telnet Express A
DTC dedicated to providing
protocol conversion between
telnet on TCP/IP and AFCP to
allow incoming calls from the
ARPA environment to HP 3000
systems.
HP PPN Hewlett-Packard
Private Packet Network.
Hewlett-Packard’s own
packet-switching X.25 network,
which gives users full control over
the administration and security
of their data communication.
HP TS8 A terminal server that
can support up to eight
asynchronous serial connections.
When used in back-to-back
configuration, users can access
HP 3000 MPE/V systems on it
through a DTC.
I
idle device timeout A timeout
defined by the Configure:CPU
command. When the timer lapses,