The C37.94 interface module supports smart grid tele-protection.

Smart Grid refers to the electricity delivery system from the point of generation to the point of consumption using analog or digital information and the communication technology for gathering and acting on the information.

Tele-protection refers to the mechanism to quickly switch on alternative routes using tele-protection equipment when a malfunction occurs. The switchover is to improve the performance of the electric grid.

The IEEE standard defines a data frame format for C37.94 interface module. The frame format is designed to allow the passage of information in packet format from the multiplexer to the tele-protection equipment and from the tele-protection equipment to the multiplexer equipment.

The features of 4-Port C37.94 Interface Module are:

• Supports 4 independent C37.94 interfaces

• Provides low latency connection over pseudowires

• Supports allocation of timeslot. Timeslot ranges from 1 to 12

• Supports Online Insertion and Removal (OIR)

• Supports traffic switch from active to standby

• Provides quick switchover to alternative route at the time of a route failure

• Populates the C37.94 controller indexes in IfTable; the IfTable is defined in IF-MIB

• Provides low latency connection to C37.94 interfaces

• Supports multiple interface modules on single chassis

• Tele-protection relay checks a failure and thus provides reliable, robust and safe electric grid

• Provides quick switchover to an alternative route of any route failure

• Prevents damage to the network and power outages

Before you configure CEM class, configure payload size and dejitter buffer values on CEM.

enable
configure terminal
class cem mycemclass
payload-size 64
dejitter-buffer 20
idle-pattern 0x55
end

Note	The default payload size varies with the number of time slots selected. Payload size can be configured to achieve lower bandwidth.

The 4-Port C37.94 interface module supports the following alarms during failure:

• Loss of Signal (LOS)

• Path Yellow Detection