Media Technology Systems ION8.8 User Manual
Page 9
Page 9 of 26
Jul‐09
Then a signature is added. The signature is used to generate a 6 digit section of the OID
string
and
ensures
that
the
version
of
the
DSP
schematic
is
valid
and
true.
Any
change
to
the
schematic
(but
not
individual
parameter
values)
will
generate
a
new
signature.
The
signature
for
the
ION4.4/ION8.8
series
is
“16.40.43.29.44.2”
and
shown
as
follows…
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).peakAudio(2680).cobraNet(1).dspExtensions(
4).control(2).signature(
16.40.43.29.44.2).
DSP
Conductor
parameters
under
this
extension
are
separated
into
two
tables
of
32‐bit
integers.
The
first
table,
rooted
at…
dspExtensions(4).control(2).signature(
16.40.43.29.44.2).controlRWTable(2)
…holds
read‐write
parameters.
The
second
table,
rooted
at…
dspExtensions(4).control(2).signature(
16.40.43.29.44.2).controlROTable(4)
…holds
read‐only
parameters.
Note
that
access
to
SNMP
tables
is
achieved
using
1‐based
indices.
The
word
offsets
specified
in
the
configuration
header
file
are
0
based.
To
construct
an
OID
for
a
read/write
variable,
append
the
parameter's
word
offset
(wo)
plus
one
to
the
OID
for
the
controlRWTable
values:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).peakAudio(2680).cobraNet(1).dspExtensions(
4).control(2).signature(
16.40.43.29.44.2).controlRWTable(2).controlRWEntry(1).controlRWValue(2).wor
doffset+1(wo+1)
For
example,
the
OID
for
a
read/write
parameter
with
word
offset
5
is…
1.3.6.1.4.1.2680.1.4.2.16.40.43.29.44.2.2.1.2.6
To
construct
an
OID
for
a
read‐only
variable,
append
the
parameter's
word
offset
(wo)
plus
one
to
the
OID
for
the
controlROTable
values:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).peakAudio(2680).cobraNet(1).dspExtensions(
4).control(2).signature(
16.40.43.29.44.2).controlROTable(4).controlROEntry(1).controlROValue(2).word
offset+1(wo+1)
For
example,
the
OID
for
a
read‐only
parameter
with
word
offset
13
is…
1.3.6.1.4.1.2680.1.4.2.16.40.43.29.44.2.4.1.2.14
The
full
list
of
SNMP
OID’s
for
the
ION4.4
and
ION8.8
are
given
in
Section
3.5
below.
The
OID’s
represent
a
table
of
32
bit
registers
in
the
memory
map
of
the
Cobranet
chipset.
Each
32
bit
register
provides
either
a
read
only
(RO)
register
for
monitoring
DSP
values
(usually
signal
or
status
information),
or
a
read/write
(RW)
register
for
controlling
DSP
values
(gain,
threshold,
delay,
etc).