Ethernet Interfaces - Avaya Nortel Communication Server 1000 Reference

Ethernet interfaces

The Chagall-2 processor contains two external Ethernet interfaces as well as internal virtual
Ethernet ports.
The MSP controls both external Ethernet interfaces and the CSP accesses them through a
virtual Ethernet port as part of the internal shared memory bus. One interface, the standard
Chagall-2 Ethernet port, provides the media path and slave control interface (TLAN) and the
other provides the ELAN interface. Another virtual Ethernet port provides the CSP to MSP
communication path.
Backplane interface
The following interfaces are provided on Communication Server 1000 MG XPEC (IP XPEC)
backplane connector for both MB and DB:
• DS-30X voice/signalling
• Card LAN
• TTY ports
DS-30X voice/signalling
The DS30X bus contains 32 timeslots for each IPE slot. Each timeslot consists of 8 bits of TDM
data and 2 bits of signalling data. The FPGA performs the transformation between 10 bits
DS30X timeslot and 8 bits TDM timeslot of the MindSpeed processors.
Card LAN
Like the MGC, the FPGA implements the local back plane 19200 baud CardLan UART
functionality. The MB and DB must share control of the Card LAN bus through hardware
negotiation. The hardware negotiation takes place in the FPGA of MB and DB.
TTY ports
Two TTY ports (TTY0, 1) from the Master Chagall-2 are routed to backplane for general
usage.
Circuit Card Reference
Ethernet interfaces
July 2011 603