RFC 3255 (rfc3255) - Page 3 of 8
Extending Point-to-Point Protocol (PPP) over Synchronous Optical NETwork/Synchronous Digital Hierarchy (SONET/SDH) with virtual concatenation, high order and low order payloads
Alternative Format: Original Text Document
RFC 3255 Extending PPP over SONET/SDH April 2002
ANSI ETSI
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STS-3c (150Mbit/s) STM-1 (150Mbit/s)
STS-12c (620Mbit/s) STM-4 AU-4-4c (620Mbit/s)
STS-48c (2.4Gbit/s) STM-16 AU-4-16c (2.4Gbit/s)
STS-192c (9.6Gbit/s) STM-64 AU-4-64c (9.6Gbit/s)
Note that AU-4-4c and AU-4-16c are not generally available in SDH
networks at present.
With virtual concatenation the following additional WAN bandwidth
links would be available for PPP over SONET/SDH:
SONET
VT-1.5-nv (n=1-64) 1.6Mbit/s-102Mbit/s
STS-1-nv (n=1-64) 49Mbit/s-3.1Gbit/s
STS-3c-nv (n=1-64) 150Mbit/s-10Gbit/s
SDH
VC-12-nv (n=1-64) 2.2Mbit/s-139Mbit/s
VC-3-nv (n=1-64) 49Mbit/s-3.1Gbit/s
VC-4-nv (n=1-64) 150Mbit/s-10Gbit/s
Higher levels of virtual concatenation are possible, but not
necessarily useful. Lower levels of virtual concatenation are
defined in the telecommunications standards for use if needed.
Table 1 and Table 2, respectively depict the SONET/SDH transport
structures that are currently available to carry various popular bit
rates. Each table contains three columns. The first column shows
the bit rates of the service to be transported.
The next column contains two values:
a) the logical signals that are currently available to provide such
transport and, b) in parenthesis, the percent efficiency of the given
transport signal without the use of virtual concatenation.
Likewise, the final column also contains two values:
a) the logical signals that are currently available to provide such
transport and, b) in parenthesis, the percent efficiency of the given
transport signal with the use of virtual concatenation.
Jones & Murton Standards Track