IPmux-4L is a TDM pseudowire access gateway extending TDM-based services over packet switched networks. It also serves as an Ethernet-based access device.
The unit provides 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-4L Ethernet network port to the PSN. A remote pseudowire device converts the packets back to TDM traffic.
The ASIC-based architecture provides a robust and high performance pseudowire solution with minimal processing delay.
The unit employs various legacy over packet protocols, 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.
IPmux-4L 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-4L 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.
Current date and time are retrieved from a dedicated server, using SNTP.
External and internal loopbacks check TDM link connectivity. A built-in internal and external BERT utility is used to monitor the TDM link quality. Virtual Cable Test (VCT) checks the quality of Ethernet cables, connectors and terminations, identifying a cable break or short.
The following E1 physical layer performance statistics are available: LOS, LOF, LCV, RAI, AIS, FEBE, BES, DM, ES, SES, UAS and LOMF. 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.