OAM Interfaces

This section covers the features and description of the OAM (Operation, Administration and Management) interfaces on OAM card supported in TJ1600-11. The OAM interface provides static user interfaces and visual indications for managing operations, administration and maintenance of the system.This card is supported in slot 14 of the TJ1600-11 system.

Front Panel View- HCPOAM01

The HCPOAM01 card provides static user interfaces for configuration and visual indications. HCPOAM01 card has the following functional features:

10/100BaseT LAN interface
LAN interface LEDs (LinkStatus, PktReceive, 10/100 status)
Craft interface (10/100 Base-T, RJ45 Interface)
F1 user channel interface (64 kbps V.24 Sync, with contra-directional clock interface - Phy is RS232) (multiplexed with the M1/F1 Interface).
Alarm LEDs (Critical, Major, and Minor)
User configurable alarm inputs.
Alarm outputs for Critical, Major and Minor.

Power specifications

TJ1600-11 HCPOAM01 - Power Specifications

Specification	Range
Input Voltage	-48V DC
Power consumption	10W

Visual indicator details

The visual indicators on the OAM include Active, Status and Alarm LEDs as per the following table:

TJ1600-11 HCPOAM01 - Status and Active LEDs indications

Card State	Status LED	Active LED
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 failed 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. 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 HCPOAM01 card:

Critical Alarm
Major Alarm
Minor Alarm

TJ1600-11 HCPOAM01 - Alarm LEDs indications

LED	Color	LED Status
Critical LED	Red	Critical alarm detected by node.
Critical LED	Off	Default State. No Critical alarm detected.
Major LED	Red	Major alarm detected by the node.
Major LED	Off	Default State. No Major alarm detected.
Minor LED	Amber	Minor alarm detected by the node.
Minor LED	Off	Default State. No Minor alarm detected.

Backplane interface

HCPOAM01 card connects to the backplane and receives the -48V DC input through the backplane.

ESI interface

The HCPOAM01 card provides ESI clock/ data interface on a RJ-45 connector.

SDH Mode: 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 OAM card contains redundant timing interfaces. The node can be synchronized from the following sources from OAM card as follows:
- Clock derived from External BITS clock.
- Clock derived from External BITS data.

LAN interface

The LAN Interface provides a CSMA/CD based LAN transceiver of an Ethernet link. This is available as an RJ-45 connector. The Ethernet address is available in the non-volatile memory on the OAM card.

The LAN interface physical layer is completely implemented in hardware. The physical layer device provides clock recovery, bit timing, equalization and a ‘Jabber’ circuit. The Media Access Control (MAC) function is implemented in software available as part of the microcontroller. ‘Jabber’ circuitry ensures that the transmitter does not hold up the interface for more than a full frame of data.

Two LEDs are used to indicate link status of the connector. The LAN interface is associated with two LEDs, Green and Amber.

LED status and their significance - HCPOAM01

Card State	Green LED Status	Amber LED Status
Link speed 10 Mbps	-	-
Link speed 100 Mbps	-	On
NMS port up	On	-
Receiver Activity	Blink on packet received	-

Craft interface

The Local Craft terminal is an additional LAN interface. The craft is provided through a RJ-45 connector. The additional LAN interface runs a DHCP server and the port has a fixed IP address 192.168.1.1, which cannot be changed. Hence, if there is any problem with the local LAN network, the LAN port is always available for a telnet session or accessing the WUI.

External alarms interface

The OAM 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 OAM card. When an event occurs, which activates the trigger connected to the external alarm input, the node raises an environmental alarm. The external inputs are either enabled or disabled from the node user interface. The severity, alarm text, and the SNMP trap ID can be edited from the node user interface; for more information refer to the User Interface Guide. The Alm. In (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 node. The alarm-outs are classified as minor, major, and critical. The Alm. Out (Alarm Out) interface is through a RJ-45 connector.

MGN interface

HCPOAM01 provides five MGN (Management) interfaces.

MGN1 and MGN2 interfaces are used for Multi Shelf connection. The MGN1 and MGN2 on Master (Main) chassis can be connected to two other Slave (subtending) chassis using two RJ-45 cables. The Slave chassis in turn can connect to other slave chassis thus supporting a Linear or Ring form of Multi Shelf arrangement.

MGN3, MGN4, and MGN5 interfaces are used for External Management Interface Configuration from the node WUI. Among these three, any port can be used for connecting the node to a third party amplifier such as high power OFA card.