X.21 over IP Ethernet

The IP•Tube X21 encapsulates synchronous serial data from Data Terminal or Communication Equipment into IP packets. These IP packets are sent to a remote IP•Tube X21 where the serial data is de-encapsulated and synchronously clocked into the remote Data Equipment. Configured Data rates from 75 bits per second to 25.6 million bits per second.

The IP connection provides for the transparent interconnection of Synchronous Serial Data Equipment via LANs, WANs, MANs, Satellite and Wireless Ethernet.

IP•Tube X21 provides for the leveraging of existing synchronous serial bulk rate encryptors such as KIV-7, KIV-19, OMNIxi and KG-84.

Type 1 Encryptors Over IP

The Protector option provides for automatic protection of the Serial circuit over independent IP packet routes. After conversion of the Serial circuit into IP packets, two identical packet streams are created. These duplicate packet streams are used to provide redundant IP connectivity to the remote location in either “Always-On” or “On-Demand” switch over modes.

The need to Protect Critical Communications is in high demand for the following applications:

• Public Safety Network Redundancy for Police, Fire and Medical
• Auto Recovery for Military Communication
• Delivering on Service Level Agreements
• Resilient Cellular Backhaul

Always-On
In Always-On mode, the Protector sends two identical packet streams simultaneously on the LAN1 and LAN2 ports of the local IP•Tube. The remote unit monitors both LAN1 and LAN2 incoming traffic and on a packet by packet basis selects the best packet to use for conversion from IP back to Serial. In most cases, switching of the receive packet source between LAN1 and LAN2 can be done without Serial circuit interruption.

On Demand Protection
In “On-Demand” mode, the Protector only sends the duplicate packet stream over the second IP connection (LAN2 of the IP-Tube) if a failure is detected on the first IP connection. “On-Demand” connections can be used for cost savings or bandwidth reasons.