OSCF-S and OSCF-D

Optical Supervisory Channel Filter (OSCF) adds and drops the supervisory channel wavelength primarily at the terminal, OADM, and intermediate line amplifier (ILA) sites where the OFA are used. 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. A drop filter is required at the input of the DWDM amplifier and a add filter is required at the output of the DWDM amplifier.

This card either contains a single add and drop module (OSCF-S) or dual add and drop modules (OSCF-D), both of which can be used with OFA by plugging it in the card and no separate slot is required.

Front panel

The OSCF module is plugged into the OFA card at the center. OSCF-S and OSCF-D modules are shown in the figures below.

Power specifications

It is purely a passive card or unit.

Visual indicator details

There is no LED visual indication for this card or unit.

OSCF module types

Following types of OSCF are available.

Types of OSCF

Functional description

Following is a schematic of the OSCF module connectivity.

Typical specifications

Typical specification and functionalities of the OSCF modules are:

• Support add and drop of the OSC channels at 1510nm
• Purely passive, used as a plug in the OFA cards
• Supports single add and drop or dual add and drop filters for Terminal and ILA or OADM locations

Typical Specifications of OSCF