Cross-connection features
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Cross-connection rates
Metropolis
®
AMU supports bidirectional cross-connections for VC-12, VC-3 and VC-4.
The cross connect matrix is 100% flexible and non blocking.
The main unit supports loopbacks on incoming STM-N signals. Loopback
cross-connections are possible on VC-12 and VC-3 level as well as VC-4 level.
Transparent DCC cut-through
The MI-16/4 system supports up to 20 bi-directional connections for transparent DCC
forwarding through the system from one STM-N port to another. Each bi-directional
connection can support a transparent link for the DCC-RS or the DCC-MS or both
DCC channels associated with a single STM-N interface. However, note that only 20
bi-directional connections can be supported with a combination of the MI-16/4 main
unit and the Sl-14/8 unit.
The MI-14/4 system supports up to eight bidirectional connections for transparent DCC
forwarding through the system from STM-N port to another. Each connection can
support transparent link for the DCC-RS or the DCC-MS or both DCC channels
associated with a single STM-N interface.
The supported framing method is HDLC.
Please note that the same pool of connections that are available for Transparent DCC
cut-through is also required for connecting the DCC of an STM-N port to the internal
IS_IS router. This means a restriction on the number of available connections for DCC
cut-through purposes.
Slaved switching for MSP is applicable to transparent DCC cut-through connections.
The Metropolis
®
AMU cross-connection function provides the following DCC features.
•
Upto 40 MS-DCC and 40 RS-DCC terminations per system (4 from both main
units, 8 from each tributary slot); via 2 TDM ports and a separate TDM port for
in-band management channels. Users can access RS-DCC or MS-DCC or both
DCC channels of at most 16 different STM-N interfaces (including line and
tributary).
•
DCC support on STM-16 optical line interfaces via D1-3. The OSI layer 2 and 3
functionality is supported via the RS-DCC channel of the STM-16 optical line
interface. Each RS-DCC channel can be enabled or disabled individually.
•
DCC support on STM-16 optical line interfaces via D4-12. The OSI lsyer 2 and 3
functionality is supported via the MS-DCC channel of the STM-16 optical line
interface. Each MS-DCC channel can be enabled or disabled individually.
Features
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3-16
Lucent Technologies - Proprietary
See notice on first page
365-312-847R4.0
Issue 4, November 2006