TDM Pseudowire Access Gateway

RAD’s IPmux-4L TDM pseudowire access gateway extends TDM and Ethernet services over packet switched networks. It enables seamless migration to NG packet networks and services using standard TDMoIP, CESoPSN and SAToP encapsulation with minimal processing delay. The IPmux-4L TDM pseudowire access gateway converges full, fractional and unframed E1 streams along with Fast Ethernet user traffic over IP, MPLS or Ethernet networks, providing an ideal solution for circuit emulation and legacy leased line services, as well as for PBX backhaul, PSTN access and TDM trunking over packet transport.

• Provides cost-competitive solution for delivering legacy and LAN services over packet transport instead of costly leased lines

• Maintain highly accuracy synchronization under changing network load conditions

• Easily manage and provision TDM pseudowire connections

• Ensure Ethernet QoS with Ethernet switching and bridging capabilities

The IPmux-4L TDM pseudowire access gateway offers an ideal solution for economical PSTN access and TDM trunking over wired and radio packet access. It works opposite other IPmux CPEs, such as the IPmux-2L and IPmux-24, in point-to-point installations. Alternatively, it connects to the IPmux-155L, Gmux-2000 or Megaplex-4100 pseudowire aggregation gateways in hub-and spoke topologies. With extensive TDM pseudowire support, it enables enterprises and utility companies to take advantage of new packet switched networks for legacy services transport, without replacing their existing equipment or affecting service quality.

Incorporating RAD’s new generation of ASIC processors, the IPmux-4L features enhanced pseudowire performance with minimal processing delay, including support for all standard TDM circuit emulation modes, such as TDMoIP, CESoPSN and SAToP. Featuring a 64-circuit pseudowire capacity, the IPmux-4L supports individually configured pseudowire connections in timeslot granularity, thereby supporting multiple PW types simultaneously. By grooming DS0-level bundles, the IPmux-4L also facilitates an efficient use of the TDM ports.

The IPmux-4L supports various clocking options to ensure synchronization as any standard TDM device. These include loopback timing, external clock source or internal, using the device’s internal oscillator. The IPmux-4L can also recover the original clock with great accuracy, using per-port adaptive clock recovery. It complies with G.823 traffic interface mask and provides high accuracy synchronization.

The IPmux-4L TDM pseudowire access gateway includes an Ethernet switch featuring three Ethernet ports, whereby one port serves as the network interface and the other two are used for user traffic. Supported Ethernet attributes include port-based VLAN membership and VLAN tagging, as well as VLAN stacking (Q-in-Q). In addition, it supports port-based rate limitation, enabling the total transmitted bandwidth to be adapted to the limitations of the transport media. Ethernet QoS features include four priority queues, scheduled by Strict Priority or Weighted Fair Queue (WFQ). Traffic is classified according to IP Precedence, 802.1p, DSCP, or port default priority.

The IPmux-4L TDM pseudowire access gateway features flexible management capabilities, including local management via an ASCII terminal (RS-232). In addition, remote management can be performed either inband or out-of-band, using the network or user ports, while maintaining separation between management and user traffic via the use of VLANs. Advanced FCAPS (Fault, Configuration, Accounting, Performance, Security) and diagnostic tools are provided by RADview-EMS, RAD’s carrier-class element management system, via an SNMP-based GUI.

 

The IPmux-4L also supports a variety of configuration access channels, including Telnet, SNMP, Web server, and TFTP.