Alcatel 1850 TSS-320 Technical Handbook page 159

– F interface: the F interface allows for connection to a Local Craft Terminal for OAM activity.
The interface is supported through a pair of serial channels:
• The "first" of these channels consists of a point-to-point serial link with a standard RS232
electrical interface, suitable for asynchronous communications at speed up to 38400 bit/sec;
It is connected to a port of the "PQ3/MC1-B" module; the physical access is provided through
a RJ-45 connector available at the unit's front panel of the board.
• The "second" channel available as part of the F interface consists of a serial interface compliant
with the Universal Serial Bus specification 1.1, able to support both the 12 Mb/s (full speed) and
the 1.5Mb/s (low speed) modes.
It is connected to a port of the "PQ3/MC1-B" module; the physical access to this interface is
provided through a standard USB mini–B receptacle at the unit front panel.
– HUSB Interface: this interface consists of a USB V2.0 host port accessible at the front panel of the
"EC320" unit; it is available to connect external USB slave devices such as "disk-on-key" or similar
devices.
– LED Interface: the "EC320" board provides eight LEDs, located at the unit's front panel.
Six LEDs are related to NE alarms and are typically associated to an alarm category (critical, urgent/
major, not urgent/minor, abnormal, warning and attended).
The remaining two are used as "board status" indication and "EPS status".
The status of the front-panel LEDs is controlled by the EC processor by means of signals available
from some I/O ports of the CANNONAU device accessible by the processor through the PCI bus
interface.
Back Panel Interfaces
In the following a brief description of the Back panel interfaces will be given:
– RL Interface: the RL (Rack Lamp) interface is intended to drive the visual and audible alarm
indicators showing a summary of the equipment shelves status.
The interface consists of a set of four parallel output signals with dry-contact interface through which
galvanic isolation is obtained.
Under control of the active EC processor, the dry-contacts can be left open (no alarm) or closed
(active alarm condition) toward a common, isolated RL ground.
The EC processor can control the status of the RL interfaces by means of some I/O ports of the
CANNONAU device.
At system level, the physical access to this interface is provided through one connector, located on
the shelf back panel (refer to Figure 16. on page 44)
An alarm cut-off push button is also available as part of this interface (refer to Figure 19. on page
47 and Figure 103. on page 161).
The EC320 unit provides support for the following Rack Lamps (RL) interfaces:
• RL_URG: Urgent alarm lamp command.
• RL_NURG: Not urgent alarm lamp command.
• RL_ATTD: Attended alarm lamp command: previous RL_URG or RL_NURG alarm attended.
Driven closed (lamp on) by CANNONAU through software control when the front–panel Alarm
Cut-Off push–button on one of the "EC320" units is pressed and a RL_URG and/or RL_NURG
alarm is active; this action clears only RL_NURG.
The alarm is cleared by software when the root cause previously generating RL_URG or
RL_NURG disappears.
Technical Handbook Common
Unit Descriptions
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01 157/270