3276/78
Emulation Mode
You
may
attach
your
terminal
to a System/360 or a System/370
through
an
IBM 2701
Data
Adapter
Unit,
an
IBM 2703 Transmission Control
Unit,
an
Integrated
CommunicationAdap-
ter,
or
an
IBM 3704
or
3705 Communications Controller.
Other
supported
hosts
include
the
Systeml3, Systeml303X,
the
3790,
or
any
other
mainframe
that
executes IBM
operating
systems
and
VTAM, BTAM,
or
TCAM access methods
and
is
capable of
supporting
3276
Control Units.
NOTE: As
the
8100 Information System
requires
SDLC protocol,
the
HP
2625A offers no
support
for
this
host.
DATACOMM
The
HP
2625A
supports
Binary
Synchronous Communications (BSC) over duplex or half-
duplex facilities.
Such
communications only use
the
Multipoint
Data
Link
mode
of
operation.
Communications
are
handled
by system
hardware
and
software.
The
following
statements
apply:
• Transmission occurs over a non-switched (private leased) line.
• The line protocol
is
multipoint
(non-contention)
Binary
Synchronous Communications
(BSC).
• The
HP
2625A only supports
the
EBCDIC (Extended
Binary
Coded Decimal
Interchange
Code) code
structure.
• Connection to
the
line is
made
through
a modem or a modem bypass cable. Modems
at
the
terminal
end
and
host
computer
end
must
be compatible
and
properly
strapped.
• The
HP
2625A
can
function on a communication line
with
IBM 3270 Display
System
terminals.
However, you
cannot
mix
the
two
within
one modem drop line.
For
example,
only
HP
2625A's
can
be daisy-chained together.
It
is
not
possible to connect
an
IBM 3278
Display
Station
to
an
HP
2625A.
•
It
is
not
possible to use
the
HP
2625A for a local
channel
IBM
mainframe
attachment.
If
you
are
unfamiliar
with
Binary
Synchronous Communications, you should consult
the
following IBM
manuals
for necessary details:
• General
Information-Binary
Synchronous Communications
• Introduction to the
IBM
3704
and
3705 Communications Controllers
•
IBM
2703 Transmission Control Component Description
•
IBM
2701 Data
Adapter
Unit Component Description
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