OAM Interfaces

OAM interfaces are included with the OAMC controller card in the TJ1600-2 node.

The OSC ports (P2 and P3) are used for out of band optical management communication for the DWDM configuration of the node. P1 and P4 interfaces are used for Multi-Shelf connectivity. P5 is used as NMS port.

OAM provides static user interfaces for configuration and visual indications. OAM has the following functional features:

Provides BITS DATA, LCT, Alarm IN, Alarm Out, OSC interfaces.
Alarm LEDs (Critical, Major, Minor).
Power, Active, Status LED display.
User configurable alarm inputs.
Alarm outputs for Critical, Major, and Minor.

Visual indicator details

The visual indicators on the OAMC nclude Active, Status, Power, and Alarm LEDs

TJ1600-2 OAMC card - Status and Active LED indications

Card State	Status LED (Sts)	Active LED (Act)
Card initialization: State before the card initialize is complete on card insertion.	Amber (Steady)	Amber (Steady)
Card in service: Initialization complete and card in service.	Green (Steady)	Green (Steady)
Card mis-match: Node has already configured the slot with some other card.	Amber	Amber
Card fail during boot up.	Red	Amber
Card failed while in-service.	Red	Green
Improper jack in of the card.	Green (Blinking)	Green (Blinking)
Hard Reset: All devices reset, FPGAs cleared and reprogrammed. Goes to initializing state next.	Amber	Amber
Soft Reset: Software is restarted, devices are reinitialized with provisioning. Goes to initializing state next.	Green	Green

There are three alarm visual indications on the faceplate of OAMC card:

Critical Alarm
Major Alarm
Minor Alarm

TJ1600-2 OAMC card - Alarm LED indications

LED	Color	LED Status
CRI (Critical)	Red	Critical alarm detected by node.
	Off	Default State. No Critical alarm detected.
MA (Major)	Red	Major alarm detected by the node.
	Off	Default State. No Major alarm detected.
MI (Minor)	Amber	Minor alarm detected by the node.
	Off	Default State. No Minor alarm detected.

BITS interface

BITS interface is provided through RJ45 connector for the Data port and clock port. The BITS clock input is at 2.048 MHz and can be nominated as a reference for node synchronization. Loss-of-Signal (LOS) is detected on the clock input and this triggers to change over to the next synchronization reference. The timing reference failed alarm is reported on the user interface. The BITS data input is at 2.048 Mbps. Both PCM30 and PCM31 (with/without CRC) framing can be used on the input. This input can be nominated as a reference for node synchronization. LOS, LOF and AIS are detected on this input and this triggers to change over to the next synchronization reference. The timing reference failed alarm is reported on the user interface. The OAMC card contains redundant timing interfaces. The node can be synchronized from the following sources from OAMC card:

Received STM-1/4/16/64 interfaces.
Clock derived from External BITS clock.
Clock derived from External BITS data.

DIAG interface

The DIAG interface is a USB connector provided on the front panel of the OAMC card. This interface offers a serial connection to node using which a user can launch a terminal session to log onto the Operating System.

NOTE: The diagnostic interface is meant for use by authorized Tejas Networks personnel only.

LCT interface

The Local Craft Terminal (LCT) is an additional LAN interface( Port P4). The LCT is provided through a RJ-45 connector. The additional LAN interface runs a DHCP server and the port has a fixed IP address192.168.1.254, which cannot be changed. The LAN port is therefore always available for debugging through the GUI or a telnet session if there is any problem with the local LAN. The active cross connect and control card directly drives the NMS interface LEDs. The cross connect and control card does not do any processing on this interface.

OSC interface

Optical Supervisory Channel (OSC) interface receives the management information from the Optical supervisory channel filter, on the DWDM transmission path, primarily at the Intermediate Line Amplifier (ILA) sites. OSC carries the management information related to the DWDM channels and enable to detect the fiber cuts and/or transmission degradation in the DWDM trunk. Typical wavelengths used for supervisory channel are 1490nm and 1510 nm which are well outside the C-band DWDM transmission. Two SFP interfaces (OSC1 and OSC2) are provided for processing the OSC information from east and west directions which can cater up to 44dB of loss in the standard optical fiber.

External alarms interface

The OAMC card provides seven external alarm inputs and four external alarm outputs.

ALARM-IN: The alarm inputs connect external triggers for events (such as open door or a shelf high temperature) to the OAMC card. When an event occurs, which activates the trigger connected to the external alarm input, the network element raises an environmental alarm. The external inputs are either enabled or disabled from the network element user interface. The severity, alarm text and the SNMP trap ID can be edited from the network element user interface. The Alarm-In interface is through a RJ-45 connector.
ALARM-OUT: The alarm outputs can be used to trigger the operation of external equipment, such as a generator, fan or audible alarm. The alarm outputs are caused by alarms detected by the network element. The alarm-outs are classified as minor, major and critical. The Alarm-Out interface is through a RJ-45 connector.

NOTE: The PSS and 10M interfaces indicated on faceplate of OAMC card is supported in future releases.