RAD IPmux-16 TDMoIP Gateway

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RAD IPmux-16 TDMoIP Gateway


  • IPmux-16 is a carrier class TDMoIP gateway enabling E1/T1 circuit extension over IP networks

  • Supports synchronous TDM-based services over IP and Ethernet networks

  • Multiplexes up to 16 E1/T1 circuits

  • Point-to-point and point-to-multipoint applications based on IP addressing

  • Totally transparent to all signaling protocols running over E1/T1

  • Extends either framed (full or fractional) or unframed E1/T1 circuits

  • E1/T1 frames or bundles of timeslots are transported over the network based on IP addressing

  • Integrated DS0 level grooming and cross connect between E1 or T1 ports

  • 10/100BaseT uplink to the network

  • QoS support:

    • Labeling IP level priority (ToS)

    • VLAN tagging and priority labeling according to IEEE 802.1 p&q

  • Low processing delay (under 2 msec)

  • Enables synchronous clock distribution across IP-based networks

  • Compensates for packet delay variation up to 32 msec for E1, 24 msec for T1

  • Redundant, hot-swappable power supplies

  • Management interfaces: SNMP, Telnet, TFTP and XMODEM with enhanced management tools and features

  • RADview Service Center application enables provisioning and monitoring of TDMoIP services

  • Compact platform, 1.5U high, 19-inch rack compatible enclosure


  • IPmux-16 provides a compact, simple to configure, and easily scalable solution for transporting TDM E1/T1 services over IP and Ethernet-based networks. IPmux-16 takes data streams from up to 16 E1/T1 ports and converts them into packets for transmission over the network. The addressing scheme of these frames is IP. The frames are transmitted via IPmux-16's 10/100BaseT port to the network. A second IPmux-16 at the remote location converts the IP packets back to TDM traffic.

  • The primary benefit of IPmux-16 is to allow transparent E1/T1 connectivity over the new generation of switch-based packet networks, both in carrier and enterprise environments.

  • IPmux-16 is a standard IP device, supporting ICMP (ping), ARP, next hop and default gateway capabilities.


  • IPmux-16 features a dry contact alarm port (with a DB-9 connector) which allows the device to send/receive alarms by opening/closing the contact between the connector's pins.


  • IPmux-16 can achieve end-to-end processing delay as low as 1.7 msec, using high-performance buffering and forwarding techniques.

  • IP packet size is configurable. Greater packet length results in greater processing delay, yet a smaller bandwidth overhead.

  • An enhanced buffering mechanism compensates for packet delay variation (jitter) of up to 32 msec for E1 or up to 24 msec for T1.


  • IPmux-16 supports VLAN tagging and priority labeling according to 802.1 p&q.

  • The user can configure the ToS (Type of Service) of the outgoing IP frames. This allows an en-route Layer-3 router or switch, which supports ToS (or Diffserv), to give higher priority to IPmux-16 traffic for delay-sensitive applications.

  • Assigned, IANA-registered UDP socket number for TDMoIP simplifies flow classification through switches and routers.


  • Two types of service are offered:

    • Unframed: IPmux-16 extends full E1/T1 circuits transparently across the IP network, regardless of framing structure.

    • Structured: IPmux-16 can be configured on a per timeslot basis for fractional E1/T1 services over IP networks. CAS can be enabled.

  • Multibundling (grouping timeslots originating from a specific E1 or T1 port) can be performed for up to 31 bundles per E1 port and 24 bundles per T1 port for transport over the network. Both mesh and star topologies are supported.

  • IPmux-4 allows an internal cross connect of bundles between its E1 or T1 ports.


  • IPmux-16 maintains synchronization between TDM devices by deploying advanced clock distribution mechanisms. The clocking options are:

    • Internal: The master clock source for the TDM circuit is provided by the clock's internal oscillator of the IPmux-16.

    • Loopback: The transmit clock is derived from the respective port's receive clock.

    • Adaptive: The clock is recovered from the Ethernet network interface.

    • External: The external port is available and may be used to synchronize E1/T1 interfaces.


  • Each Ethernet module includes a single standard 10/100BaseT port with auto-negotiation support, which provides the uplink to the network. If auto-negotiation is disabled, IPmux-16 can be configured to any of the following:

    • 100BaseT - full duplex

    • 100BaseT - half duplex

    • 10BaseT - full duplex

    • 10BaseT - half duplex.


  • Each E1 or T1 module provides either four or eight standard E1 or T1 interfaces, which enable connectivity to any standard E1 or T1 device (see Ordering).

  • Integral LTU/CSU can be enabled for line protection and long haul applications.

  • Alarm detection and insertion are supported together with error statistics. SES/UAS statistics, LOS/AIS physical layer alarms and remote loop/local loop test modes are all supported. Standard E1/T1 alarms are supported end-to-end.


  • The IPmux-16 modular power supply supports carrier environments. The power supply is available for either -36 to -72 VDC, or 100 to 240 VAC.

  • IPmux-16 features hot-swappable power supplies, enabling switching from one power supply to another without the need to shut down the unit.


  • IPmux-16 supports E1/T1 remote loop and local loop testing. End-to-end alarm generation and end-to-end AIS indication are also provided. In the event that a local E1/T1 port receives an AIS, it is passed to the remote port via the Ethernet/IP network. If a local Ethernet port is not connected, an AIS indication will be generated both in the local and the remote devices.

  • On the E1/T1 ports, SES and UAS statistics are collected in 15-minute intervals and are stored for 24 hours (96 intervals). E1/T1 physical layer alarms (LOS, AIS, LOF, LCV) are also supported. ? IPmux-16 monitors LAN and IP layer network condition statistics, such as packet loss and packet delay variation (jitter). The events are stored in log files and SNMP traps are generated.

  • IPmux-16 performs an internal built-in test (BIT) after power up. The results of the test are visible via the local terminal.

  • Software download is supported via the local terminal using XMODEM, or remotely, using TFTP. After downloading a new version of software, IPmux-16 automatically saves the previous version in non-volatile memory for backup purposes. Similarly, copies of the configuration file may be downloaded and uploaded to a remote workstation for backup and restore purposes. ? IPmux-16 can be configured and monitored locally via an ASCII terminal, or remotely via Telnet or RADview.

  • RADview-HPOV, RAD's SNMP-based network management system, provides a user-friendly graphical display that allows monitoring and configuring of multiple IPmux devices. Fault isolation, statistics and events gathering are available. RADview-HPOV can hold a complete predefined IPmux-16 configuration to shorten and simplify field installation.

  • The RADview Service Center and element manager package supplies and monitors TDM over IP (TDMoIP) devices and circuits. The Service Center's intuitive GUI interface, "point-and-click" functionality and easy-to-follow wizards increase the efficiency and accuracy of the service provisioning process




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