OSMC01

OSMC01 (Optical Shelf Management Controller) performs Optical Supervisory Channel (OSC) processing up to 100Mbps, control path processing and timing functions.

OSMC01 card has a processor complex to perform APS/IBC route communication/Node management and other miscellaneous functions required for the system.

OSMC01 card supports the following functional features:

1. Four Passive Inventory Management (PIM) ports.
2. Supports redundancy. In redundant mode, system will contain 2 such cards.
3. Switch to holdover in absence of selected primary and/or secondary reference clocks.
4. Card present information of all other cards in the system to detect jack-in/jack-out of the cards in the system.
5. Generate and distribute system timing (clocks and frame syncs), system frame and system multi-frame signals to all line card slots.
6. Two OSC channels of 155 Mbps and two user channels of 10 Mbps are present.
7. Temperature monitoring.
8. Supports 4GB disks.

NOTE: Point number 4, 5, and 6 are not supported for this release.

The key functions of OSMC01 card are as follows:

• Processor Function: OSMC01 card has a processor that performs the configuration, control and processing of all the other subsystems. The processor is a micro controller which has on board external memory to implement the required functions. The software residing in this block controls the overall management of the system. Processor card is a daughter card that interfaces with different memory interfaces like SDRAM, Flash Memory, PCMCIA and other memory. This function is also responsible for implementing watchdog logic for the system.
• OSC Processing: 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.
• Synchronization Function: OSMC01 card has a Stratum-3 compliant clock generation unit. The PLL in synchronization unit can synchronize to a variety of timing sources, selected via the user interface. Synchronization Status Messaging (SSM) is implemented in the software to propagate the clock quality information to neighboring elements and to select the best quality clock among a set of nominated clock sources. The synchronization unit is commonly called the timing module.

  NOTE: Synchronization Function is not supported.

Front panel

The following figure shows the front panel diagram of OSMC01 card supported in TJ1600-6 chassis without the mechanical adapter:

DIAG interface

The DIAG interface is a USB connector provided on the front panel of the OSMC01 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.

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.

Timing interface

OSMC is the timing master for SDH/1588 V2 timing schemes.

NOTE: Timing interface is not supported for this release.

Power specifications

OSMC01 - Power specification

Visual indicator details

The visual indicators on the OSMC01 card has two LEDs - the Sts (Status) LED indicate the status of the card and the Act (Active) LED indicates whether the card is active or not.

OSMC01 - Active and status LEDs indications