RAD Launches Central Office Pseudowire Access Gateway Supporting TDM Services over Packet Infrastructure.

RAD Data Communications has launched version 1.14 of its Gmux-2000 TDM pseudowire gateway for central offices and points of presence (POPs), a cost-effective, modular, high capacity solution for transporting multiple E1, T1 links over IP, Ethernet and MPLS-based networks.

 

The Gmux-2000 supports all TDM services over packet networks. Transparent connectivity over Eth/IP/MPLS maintains all features and functionality of the legacy network.

 

Pseudowire enables enterprises to run voice, video, and legacy data over the packet-switched networks, thereby minimizing network maintenance and operating costs. Both service providers and data carriers can benefit from pseudowire technologies. Service providers can migrate to Eth/IP/MPLS while continuing to provide revenue-generating legacy services. Data carriers profit by enabling them to offer lucrative leased-line and private line services. Coupled with RAD’s remote site gateways, the Gmux-2000 TDM pseudowire gateway for central sites offers a complete, cost-effective TDM pseudowire system solution.

 

The Gmux-2000 TDM pseudowire gateway comes in a 6U-high chassis, mountable in a 19" ETSI or ANSI rack. It can be configured with up to seven I/O modules and up to two PSN modules, in addition to fully redundant control modules, AC/DC power supply modules, and a cooling fan module. The device can be configured to support up to 196 E1/T1 circuits or 1xC.STM-1/C.OC.

 

The Gmux-2000 TDM pseudowire gateway for central sites supports up to seven voice compression modules compatible with the Vmux product line. Each voice compression module supports up to 16 E1 data streams over two E1 links. Alternatively, the voice traffic can be aggregated into an STM-1/OC-3 trunk. The Gmux-2000 TDM pseudowire gateway for central sites can also accommodate up to seven E1-VC/16 modules. A chassis equipped with one or two STM-1/OC-3 link modules supports six or five E1-VC/16 modules, respectively.

Each E1-VC/16 module is equipped with two E1 main link ports, which transmit the voice traffic from its 16 E1 user ports (up to 3,360 voice channels supported per chassis). The user traffic distribution between the main links is user-configurable so that any user voice channel can be groomed to any link. Alternatively, the Gmux-2000 TDM pseudowire gateway for central sites can be equipped with an STM-1/OC-3 link module to aggregate the user voice traffic into a single 155 Mbps stream via the internal chassis bus, for transmission over an SDH / SONET network link. Up to six E1-VC/16 modules (for up to 2,880 voice channels) can be supported by a single Gmux-2000 chassis equipped with an STM-1/OC-3 link module.

The E1-VC/16 modules utilize RAD’s unique TDMoIP® multiplexing, together with G.723.1 and G.729 Annex A voice compression algorithms, to provide a total reduction of up to 16:1. This results in very efficient bandwidth utilization while preserving excellent voice quality. More traffic can be handled by fewer links with resulting cost savings on leased lines. Voice Activity Detection (VAD) and silence suppression allow the E1-VC/16 modules to dynamically allocate bandwidth for voice traffic. This improves bandwidth utilization, leaving more bandwidth for data transport. The modules detect, generate and relay DTMF, MFR2 and MFC signaling. The modules support Group III fax modem relay. Modem transmissions are handled as voice band data, and all common modem rates and standards are supported. The user can enable/disable fax or modem relay; alternatively, a maximum fax transmission rate can be defined.

 

Control modules provide the SNMP agent, human interface and database storage for configuration and control of the entire Gmux-2000 TDM pseudowire gateway for central sites system. These modules are equipped with an RS-232 port, as well as a 10BaseT port for out-of-band management. Each control module provides redundant interfaces for connecting external G.812 station clocks and for alarm inputs/outputs.

The Gmux-2000 TDM pseudowire gateway for central sites is part of an overall solution for transferring TDM bundles over IP, MPLS or Ethernet networks end-to-end, from the CPE to the point-of-presence (POP) or the central office (CO). Management of the entire system, therefore, should ideally be performed using a single management application. This unified management application, RADview Service Center TDMoIP, combines a user-friendly interface with both element and network management level capabilities