IPmux-4LGE

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IPmux-4LGE is a TDM pseudowire access gateway extending TDM-based services over packet switched networks.

PSEUDOWIRE PERFORMANCE

The units provide a legacy over PSN solution for transmitting E1 streams over packet switched networks (PSNs). The device converts the data stream from its user E1 ports into packets for transmission over the network. The addressing scheme of these packets is IP or MPLS.

These packets are transmitted via the IPmux-4LGE Ethernet network ports to the PSN. A remote pseudowire devices convert the packets back to TDM traffic. The unit supports various legacy over packet transport types, including TDMoIP, CESoPSN, SAToP and HDLCoPSN.

High-performance ASIC-based buffering and forwarding techniques achieve minimal end-to-end processing delay. Configurable packet size balances PSN throughput and delay while a jitter buffer compensates for packet delay variation (jitter) of up to 200 msec in the network. An assigned IANA-registered UDP port number for pseudowire simplifies flow classification through switches and routers.

MANAGEMENT

IPmux-4LGE can be configured and monitored locally via an ASCII terminal, or remotely via Telnet or Web browser. Management traffic can run over a dedicated VLAN. Software can be downloaded via a local
terminal using XMODEM/YMODEM, or remotely, using TFTP. After downloading a new software version, IPmux-4LGE automatically saves the previous version in non-volatile memory for backup purposes.
Also, copies of the configuration file may be downloaded and uploaded to a remote workstation for backup and restore purposes.

The Syslog protocol is used by IPmux-4LGE to generate and transmit event notification messages over IP networks to the central Syslog server. The Syslog operation is compliant with the RFC 3164 requirements.

DIAGNOSTICS

External and internal loopbacks check TDM and serial link connectivity. A built-in internal and external BERT utility is used to monitor the TDM link quality. Virtual Cable Test (VCT) check the quality
of Ethernet cables, connectors and terminations, identifying a cable break or short. LAN and IP layer network condition statistics, such as packet loss and packet delay variation (jitter), are monitored and stored by the device. Fault isolation, statistics and event logging are also available. RAD’s TDM PW OAM verifies connectivity and prevents pseudowire configuration mismatch.

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