Pseudowire Gateway: Up to 16 x E1, FE & GbE over Ethernet/IP

• Delivers Ethernet and TDM-based services over fiber and packet switched networks (PSNs)
• Up to 16 E1 user ports
• UTP/SFP; Fast/Gigabit Ethernet ports
• Multi-standard TDM pseudowire ASIC: TDMoIP, CESoPSN, SAToP
• QoS support with four priority queues
• Pseudowire OAM
• Per ITU-T G.823 jitter and wander performance

• Multi-functional device extends TDM services over  PSNs and serves as Ethernet access device
• Comprehensive, standards-based TDM pseudowire support
• Service granularity for point-to-multipoint topolgies with individual TDM pseudowire configuration
• Standard-based Ethernet ring support ensures high resiliency and allows easy replacement of obsolete SDH access, as well as re-use of existing fiber rings 
• High quality TDM service under changing network loads greatly improving the ability to maintain high accuracy synchronization

Advanced pseudowire functionality

Incorporating RAD’s new generation of ASIC processors, the IPmux-16L delivers enhanced pseudowire performance with minimal processing delay, including support for all standard TDM circuit emulation modes: TDMoIP, CESoPSN, and SAToP. By grooming E1 bundles in timeslot granularity, the IPmux-16L also facilitates an efficient use of the TDM ports. 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.

Pseudowire timing

The IPmux-16L device supports various clocking options to ensure synchronization as any standard TDM device. These include loopback timing, external clock source or internal, using the devices’ internal oscillator.

The device 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 capabilities

IPmux-16L features three GbE network ports and three FE user ports. All ports support both copper and fiber interfaces with auto-negotiation.

The device's internal Ethernet bridge supports both VLAN-aware and VLAN-unaware modes, as well as port-based rate-limiting, VLAN membership, VLAN tagging and stacking (Q-in-Q), and filtering. Standard IP features supported by the IPmux-16L include ICMP (ping), ARP, next hop, and default gateway.

The IPmux-16L employs ITU-T G.8032 Ethernet Ring Protection Switching (ERPS) to mitigate against link and node failures and ensure sub-50 ms restoration. Failures in the ring are detected using Ethernet OAM (ITU-T Y.1731) continuity check (CC) messages between adjacent nodes.

Supported Ethernet attributes include portbased VLAN membership and VLAN tagging, as well as VLAN stacking (Q-in-Q). In addition, the device 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-16L 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, Administration, Performance, Security) and diagnostic tools are provided by RADview-EMS, RAD’s carrier-class element management system, via an SNMP-based GUI.

The device also supports a variety of access protocols, including Telnet, SNMP, Web server, and TFTP.