GarrettCom Magnum 20X - Manual (Page 31)

This section describes the functionality and operation of the Magnum 200X Two-
Port repeaters.
4.1 Repeater Functionality
The Magnum 200X units operate as mixed-media or homogeneous Ethernet
repeaters. Both types are compliant with IEEE 802.3 specifications and supports all IEEE
defined media, including 10BASE-T, 10BASE-FL, FOIRL, 10BASE2, and 10BASE5. The
following describes the basic functionality of the Magnum 200X Two-Port Repeaters.
1. Repeater Functions: Each RPM port operates in conjunction with the
controller functions of the Magnum 200X base unit, functioning together as a fully
compliant Ethernet repeater. Each 200X unit counts as a single repeater.
2. Collisions: When a collision is detected at a port other than the original
receiving port, it generates a jam pattern to the other ports. When a collision
signal is detected at a receiving port, it generates a jam pattern to the other port.
The sequence of jam signals depends on the sequence and location of collisions.
3. Partitioning and Re-connection: A Magnum 200X will automatically
disconnect (partition) any segment (port) when 64 consecutive collisions occur or
after 6.5 ms of continuous transmissions. Network integrity is checked every 800
ms and segment (port) reconnection occurs after a 512-bit packet is transmitted
without error.
4. Link Status: The Magnum 200X RPMs indicate link integrity for fiber optic
and twisted pair segments. Broken cables or a loss of power at any point in
twisted pair and fiber segments will turn off the LINK LED indicator on the
associated RPM.