CDM-750 Advanced High-Speed Trunking Modem
Revision 2
Front Panel Operation
MN-CDM750
5–8
5.2.2.1.1 Single Stream Mode vs. MultiStream Mode Operation
Single
Stream
Mode
is
the
conventional
way
to
transport
a
single
type
of
traffic
data
over
satellite,
whereas
MultiStream
Mode
allows
more
than
one
type
of
traffic
data
to
be
active
at
the
same
time.
Note
the
following:
•
For
Single
Stream
Mode:
1.
A
single
PIIC
module
is
installed
and
active
and
all
other
interfaces
are
either
not
installed
(i.e.,
NONE
)
or
are
installed
but
not
active
(i.e.,
Off
),
or
2.
Any
combination
of
Gigabit
Ethernet
(
GBE1
/
J5
|
DATA
port,
GBE2
/
J6
|DATA
port,
or
Optical
/
J7
|
OPTICAL
port)
is
enabled,
but
neither
PIIC
slot
is
active
(i.e.,
NONE
or
Off
).
The
three
Gigabit
Ethernet
data
interfaces
are
considered
a
single
data
interface
type,
regardless
if
one
or
more
of
these
interfaces
are
active.
•
For
MultiStream
Mode:
1.
MultiStream
Mode
is
an
internal
multiplexing
(MUX)
and
de
‐
multiplexing
(De
‐
MUX)
of
data
interface
types,
which
allows
two
or
more
data
traffic
types
to
co
‐
exist
simultaneously
in
a
single
carrier.
2.
One
or
more
of
the
GbE
interfaces
MUST
be
active
in
order
to
enter
or
exit
from
MultiStream
Mode.
Therefore,
at
least
one
of
the
GbE
interfaces
must
be
active
at
the
same
time
that
at
least
one
of
the
PIIC
slots
is
active
(e.g.,
PIIC1=G703
‐
E3).
The
CONFIG:
Intf
screen
display
example
shows
the
modem
in
MultiStream
Mode.
3.
Adaptive
Coding
and
Modulation
(ACM)
is
non
‐
functional
while
in
MultiStream
Mode.
All
other
WAN
optimization
features
(Carrier
‐
in
‐
Carrier,
GZip
compression,
etc.)
are
functional
in
MultiStream
Mode.
4.
Because
MultiStream
Mode
is
a
MUX
of
different
data
types,
there
is
overhead
associated
with
the
total
MUX
structure.
This
associated
overhead
is
1.5%
of
the
aggregate
non
‐
Ethernet
data
in
Normal
Block
Mode,
and
5%
in
Short
Block
Mode.
For
example:
You
are
running
a
link,
using
Normal
Block
Mode,
that
is
using
MultiStream
to
aggregate
Ethernet
traffic
and
two
G.703
E3
(34.368
Mbps)
connections.
The
computation
of
the
modem
Tx
link’s
configuration
for
minimal
support
is
therefore
(34.368+34.368)*1.015=69.768 Mpbs
.
Any
data
rate
that
is
ABOVE
this
minimum
data
rate
is
given
to
the
GbE
interfaces
–
meaning,
per
the
preceding
computation,
if
the
modem
Tx
was
set
to
100
Mbps,
then
the
remaining
30.232
Mbps
(100Mbps–69.767Mpbs=30.232Mbps)
would
be
allocated
to
the
Ethernet
traffic
type.
Summary of Contents for CDM-750
Page 76: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Updating Firmware MN CDM750 4 12 Notes...
Page 224: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix A MN CDM750 A 4 Notes...
Page 234: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix B MN CDM750 B 10 Notes...
Page 256: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix C MN CDM750 C 22 Notes...
Page 280: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix D MN CDM750 D 24 Notes...
Page 300: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...
