Alcatel 1850 TSS-320 Technical Handbook page 161

Configuration Memory" located on one of the "Bus Termination" boards where data related to the
MAC address of the NE and other parameters are stored.
– Qecc Interface: the Qecc interface is defined in the TMN environment as a communication interface
for the exchange of management messages between an OS station and remote NEs; it uses the
Embedded Communication Channels (ECC) defined in the MS–OH, RS–OH and optionally P–OH
sections of the SDH frame as physical layer.
Three different channels are defined:
• DCC_M: standardized multiplex section DCC using the D4 ÷ D12 bytes, with an average bit rate
of 576 kb/s.
• DCC_R: standardized regenerator section DCC using the D1 ÷ D3 bytes, with an average bit
rate of 192 kb/s.
• DCC_P: additional path DCC using the F2 or F3 bytes, with an average bit rate of 64 kb/s.
Qecc interface consists of a set of 33 synchronous point-to-point bi-directional links coming from the
back-panel and carrying data related to the Data Communication Channels mapped
in the OH section of the SDH frame; 32 of them are connected to the port boards in the sub-rack,
supporting the real ECC traffic, whereas the last one is connected to the SERVICE unit to provide an
access to/from the AUX interfaces.
Data related to a single physical port are transported on a single link into a TDM proprietary frame at
a bit rate of 6.48 Mb/s, which carries a mixing of 64 kb/s, 192 kb/s and 576 kb/s HDLC channels.
The links are locally terminated and routed to the controller function for layer-2 protocol processing
and are then made available to the EC processor for the upper layer protocol processing, as part
of the MCF.
– HDDUSB Interface: this interface consists of two USB V2.0 ports, one operating in host mode and
one in function mode and is used to support redundant Hard Disk Drive (HDD) solutions, regardless
the redundancy of the EC board.
The host port is used to access a remote HDD device, usually located on the redundant EC board
or on a dedicated HDD redundancy board; the function port is used to give the remote EC board
(when present in the system) access to the local HDD.
Host and function ports of the redundant EC boards are cross-connected each other through the
back panel.
– CMISS Interface: the Card Missing Interface is related to the circuitry for the acquisition of the
information related to the presence of the port and matrix cards in the sub-rack.
Card missing bits are reported to the EC320 board by the POW320 [A, B] units using a dedicated
serial link in addition to a "card missing" (CMISS) signal of the POW320 unit.
– PIO Interface: this interface consists of general purpose I/O signals that are available to exchange
status information with other boards in the system through the back panel.
Signals related to the following functions are typically part of the PIO interface:
• Card Presence notification
• Alarm status notification
– I2C Interface: this interface is available at the back panel interface as a simple extension of the I2C
interface of the "PQ3/MC1-B" daughter board; it can be used in order to access slave devices.
– TRU link interface: this interface consist of an extension of the local SPI bus interface suitable to
access a pair of remote inventory memories and some alarm signals related to circuitry physically
located on board of the external TRU module.
The interface is not controlled by the local EC processor.
Technical Handbook Common
Unit Descriptions
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01 159/270