<s>
Route	B-Protocol
Reestablishment	I-Protocol
Notification	I-Protocol
(	O
RRN	O
)	O
is	O
a	O
type	O
of	O
notification	O
that	O
is	O
used	O
in	O
some	O
communications	O
protocols	O
that	O
use	O
time-division	B-Protocol
multiplexing	I-Protocol
.	O
</s>
