Technical Description
3.6.3.1.1 TDM
This block interfaces the TDM bus by receiving and transmitting the traffic
(nxE1) and DCN channels (nx64 kbit/s).
3.6.3.1.2 Control and Supervision
This block interfaces the PCI bus and handles control and supervision. Its
main functions are to collect alarms, control settings and tests. The block
communicates with the NPU over the PCI bus.
The block holds a Device Processor (DP) running plug-in unit specific software.
3.6.3.1.3 SPI
This block interfaces the SPI bus and handles equipment status. Failure is
indicated by LED’s on the front of the unit.
3.6.3.1.4 Ethernet over SDH
This block maps the Ethernet frames (up to about 600 Mbit/s) into Generic
Framing Protocol (GFP) frames. These frames builds up the Virtual
Concatenation Groups (VCG)s. One VCG is a multiple of VC-12s, VC-3s or
VC-4s and there is a maximum of 7 VCGs.
3.6.3.1.5 PDH over SDH
This block maps the 21xE1 to/from VC-12s.
3.6.3.1.6 SDH ADM (Cross Connection)
This block terminates and structures 4xSTM-1 signals via radio. The
corresponding DCN channels are terminated. The VC-12s, VC-3s and VC-4s
of the corresponding VCGs respectively the VC-12s of the corresponding E1s
can be cross connected with the VCs of the 4xSTM-1 signals.
3.6.3.1.7 High Speed
This block provides a Point-to-Point connection towards the SDH modems
and the NPU3 B.
3.6.3.1.8 Power
This block interfaces the Power bus and provides secondary voltages for the
unit. All plug-in units have a standard power module providing electronic soft
start and short circuit protection, filter function, low voltage protection, DC/DC
converter and a pre-charge function.
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12/221 02-CSH 109 32/1-V1 Uen A 2008-03-14
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