Hub-Site Pseudowire Access Gateway

RAD’s IPmux-155L hub-site pseudowire access gateway is a cost-competitive access aggregator, delivering TDM pseudowires and user Fast Ethernet traffic over packet switched networks. Working opposite CPEs, such as the IPmux-24 and IPmux-2L, it functions as a pseudowire termination unit and sends TDM bundles from remote units to SDH backbones, while Ethernet traffic is directed to packet networks. Featuring standard SAToP capabilities, the IPmux-155L hub-site pseudowire access gateway allows enterprises to replace expensive leased lines with cost-effective packet transport and offers an ideal solution for economical PSTN access and PBX backhaul.

• Economical, high density gateway for extending TDM and Fast Ethernet services over Gigabit Ethernet and channelized STM-1 transport

• Helps carriers migrate their customers to packet transport by supporting existing user equipment

• Allows enterprises, utility companies and government agencies to save on leased-line costs by transporting STM-1 traffic over PSN

• Reduces PoP/CO costs by combining high-density pseudowire aggregation with Ethernet switch functionalities

RAD’s IPmux-155L hub-site pseudowire access gateway transports TDM and Ethernet traffic over PSN and SDH access with carrier-grade quality and service protection. The 19-inch modular enclosure is typically used by the following:

• Incumbent carriers wishing to migrate to packet infrastructure

• Alternative carriers offering legacy leased-line services over packet networks

• Enterprises, utilities, government and public institutions wishing to save on leased-line expenses

• Wholesale transport providers servicing 2G and 3G mobile operators

The IPmux-155L features enhanced pseudowire performance with minimal processing delay, including support for standard SAToP emulation mode. This allows the extension of TDM services from legacy backbones over greenfield packet networks without affecting service quality or user experience. The IPmux-155L supports separate configuration for up to 63 pseudowire connections. 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.

The IPmux-155L TDM pseudowire gateway supports various clocking options to ensure synchronization as any standard TDM device. These include loopback timing, external clock source or internal clock, using the device’s own oscillator. The IPmux-155L can also recover the original clock with great accuracy, using adaptive clock recovery (ACR). In addition, clock capabilities include holdover and hitless switching.

The IPmux-155L’s 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 per granular committed information rate (CIR) and committed burst size (CBS), enabling the total transmitted bandwidth to be adapted to the limitations of the transport media.