<s>
TRANSMUX	B-Protocol
(	O
Transcode-Multiplexing	O
)	O
is	O
a	O
signaling	O
format	O
change	O
in	O
telecommunications	O
signaling	O
between	O
synchronous	B-Protocol
optical	I-Protocol
network	I-Protocol
signals	O
SONET	B-Protocol
and	O
asynchronous	O
DS3	O
signals	O
.	O
</s>
<s>
A	O
DS3	O
signal	O
is	O
multiplexed	O
from	O
28	O
individual	O
DS1	B-Protocol
signals	O
in	O
a	O
bit-interleaved	O
fashion	O
,	O
with	O
framing	O
and	O
overhead	O
at	O
determined	O
intervals	O
.	O
</s>
<s>
SONET	B-Protocol
differs	O
from	O
this	O
approach	O
by	O
using	O
a	O
byte-interleaved	O
,	O
synchronous	O
,	O
multiplexing	O
technique	O
with	O
several	O
variations	O
on	O
payload	O
types	O
.	O
</s>
<s>
SONET	B-Protocol
payload	O
can	O
carry	O
multiplexed	O
lower	O
rate	O
streams	O
(	O
DS1	B-Protocol
,	O
E1	O
,	O
DS3	O
,	O
etc	O
.	O
)	O
</s>
<s>
If	O
cross-connect	O
capability	O
is	O
to	O
be	O
maintained	O
at	O
the	O
VT1.5	B-Protocol
level	O
,	O
then	O
the	O
individual	O
DS1	B-Protocol
signals	O
are	O
extracted	O
from	O
a	O
parent	O
DS3	O
or	O
electrical	O
T1	O
,	O
and	O
then	O
transmuted	O
individually	O
into	O
each	O
VT1.5	B-Protocol
.	O
</s>
<s>
If	O
a	O
complete	O
DS3	O
signal	O
is	O
to	O
be	O
delivered	O
to	O
a	O
SONET	B-Protocol
drop	O
,	O
then	O
the	O
entire	O
DS3	O
is	O
transmuted	O
intact	O
into	O
an	O
STS	O
container	O
and	O
no	O
subsequent	O
cross-connect	O
capability	O
exists	O
with	O
the	O
SONET	B-Protocol
payload	O
at	O
a	O
VT1.5	B-Protocol
level	O
.	O
</s>
<s>
White	O
Rock	O
Networks	O
Description	O
of	O
a	O
product	O
with	O
Transmux	B-Protocol
Support	O
:	O
</s>
<s>
"	O
For	O
applications	O
where	O
conversion	O
between	O
DS3	O
and	O
VT1.5	B-Protocol
mapped	O
STS-1s	O
is	O
required	O
,	O
transmux	B-Protocol
allows	O
DS3	O
embedded	O
within	O
an	O
STS-1	O
circuit	O
to	O
be	O
adapted	O
to	O
a	O
VT1.5	B-Protocol
mapped	O
STS-1	O
without	O
physically	O
terminating	O
the	O
circuit	O
as	O
a	O
DS3	O
or	O
EC-1.	O
"	O
</s>
