TDM Pseudowire Access Gateway

• Up to two framed or unframed E1 user ports
• An n x 64 user port with various serial interfaces (X.21, V.24/RS-232, RS-530/RS-422, V.35, V.36/RS-449)
• Two user LAN ports (both copper, or one copper and one fiber optic)
• A single Fast Ethernet copper or fiber network interface
• Multi-standard TDM pseudowire ASIC: TDMoIP, CESoPSN, SAToP, HDLCoPSN,
• 100 ppb frequency accuracy; High precision clock recovery per G.823
• Independent clock regeneration per E1 port
• Four priority queues (SP or WFQ); QoS per 802.1p, DSCP, IP Precedence, or per port
• Up to 63 individually configured PW connections

• Provides cost-competitive solution for delivering legacy and LAN services over packet transport instead of costly leased lines
• Converges multiple services with comprehensive pseudowire support based on industry standards
• Ensures service quality with accurate synchronization
• Enhances performance with Ethernet capabilities and quality of service functionalities

The IPmux-2L TDM pseudowire access gateway offers an ideal solution for economical PSTN access and TDM trunking over wired and radio packet access. The IPmux-2L’s extensive TDM pseudowire support enable 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.

Advanced pseudowire functionality

Incorporating RAD’s new generation of ASIC processors, the IPmux-2L features enhanced pseudowire performance with minimal processing delay, including support for all standard TDM circuit emulation modes, such as TDMoIP, CESoPSN, SAToP and HDLCoPSN. Featuring a 63-circuit pseudowire capacity, the IPmux-2L supports individually configured pseudowire connections in timeslot granularity, thereby supporting multiple PW types simultaneously. By grooming DS0-level bundles, the IPmux-2L also facilitates an efficient use of the TDM ports.

Pseudowire timing

The IPmux-2L 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-2L 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 frequency accuracy of up to 100 ppb (parts per billion).

Ethernet QoS and VLAN capabilities

The IPmux-2L 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.

EMS management

The IPmux-2L 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-2L also supports a variety of configuration access channels, including Telnet, SNMP, Web server, and TFTP.