RTRV-X25
4
of
3
Page
RTRV-X25
(svc)
16
lcn
X.25
be
to
considered
is
channel
communication
This
up
the
of
acknowledgement
successful
the
upon
a
with
packet
CALL_REQ_IND
does
This
packet.
CALL_ACC_CONN
not
imply
active.
is
communication
TL1
that
interface
X.25
be
to
considered
is
channel
communication
This
up
the
of
acknowledgement
successful
the
upon
the
and
packet
RESTART_PACKET
that
means
This
packet.
RESTART_CONFRM
or
pvc
the
establish
to
ready
and
active
is
3
layer
channel.
communication
svc
lapb
is
channel
communication
this
When
up
2
layer
,
a
receive
or
send
to
ready
and
active
is
RESTART_PACKET.
line
physical
the
if
only
up
is
line
physical
X.25
This
lapb
is
A
up.
down
necessarily
not
does
line
physical
a
example,
(for
connection
physical
the
that
mean
equipment
interfacing
the
that
but
broken
is
cable)
the
with
communication
the
acknowledge
not
does
DDM-2000.
State
entities.
above
the
of
one
each
in
explained
is
parameter
This
Address
Calling
DTE
The
Address.
Calling
DTE
X.25
their
by
defined
are
SVCs
Binary
15
to
1
as
defined
are
parameter
this
for
values
allowed
parameter
this
Furthermore,
digits.
(BCD)
Decimal
Coded
SVC
the
when
displayed
be
only
would
State
is
up
and
SVC
the
when
shown
be
not
would
State
is
down
the
if
or
Communication
X.25
Entity
interface,
X.25
PVC,
a
is
lapb
,
value)
default
(no
line.
physical
a
or
(hex)
Code
states
protocol
the
of
output
hexadecimal
a
shows
column
This
for
technicians
by
used
is
This
software.
DDM-2000
the
in
purposes.
diagnostic
OC-12
DDM-2000
1997
December
1
Issue
11-233
