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 and high-speed data 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-2L 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-2L features an internal Layer-2 Ethernet switch with three Ethernet ports. The ports can be configured to operate as network or user interfaces.
Each Ethernet port features:
- Port-based rate limiting for bandwidth control
- Four priority queues (strict or weighted) for handling traffic with different service demands. Traffic is classified according to IP Precedence, 802.1P, DSCP or port default priority.
- Port-based VLAN membership for ingress traffic restriction
- Port-based VLAN tagging
- Double VLAN tagging (VLAN stacking)
- Bridging and filtering.
The device supports standard IP features, such as ICMP (ping), ARP, next hop and default gateway.
IPmux-2L 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-2L 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.