IPmux-1E

Virtuālā TDM kanāla organizēšana

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IPmux®-1E provides legacy services over packet networks. The device converts the data stream from its user E1/T1, analog telephone or ISDN ports into packets for transmission over the network. The frame format of these packets is IP or Ethernet. These packets are transmitted via the IPmux-1E Ethernet network port to the PSN. A remote pseudowire device converts the packets back to the original user traffic format.

A powerful internal Layer-2 Ethernet switch provides a user Ethernet port with rate limiting and port-based VLAN tagging capabilities. The device supports standard IP features, such as ICMP (ping), ARP next hop and default gateway.

QoS SUPPORT

VLAN tagging and priority labeling are supported according to 802.1p&Q. pseudowire frames are assigned (tagged) a dedicated VLAN ID.
VLAN membership allows:

• Management traffic to be run over a dedicated VLAN
• User data traffic to be filtered according to a set of up to 15 VLANs.

The user can configure the ToS or Diffserv of the outgoing pseudowire packets. This allows the packets to be given a higher priority by network switches and routers. Assigned, IANA-registered UDP socket
number for TDMoIP simplifies flow classification through switches and routers.

Rate limiting can be applied on the Ethernet user port to control the maximum rate of the traffic transmitted towards the packet-switched network.

MANAGEMENT

Configuration and monitoring are performed locally via an ASCII terminal, or remotely via Telnet, or RADview. Software is downloaded via the local terminal, using XMODEM, or remotely, using TFTP. After downloading a new software version, IPmux-1E 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.

The RADview Service Center TDMoIP package controls and monitors pseudowire devices and circuits. The Service Center’s intuitive GUI, “point-and-click” functionality and easy-to-follow wizards increase the
efficiency and accuracy of the service provisioning process.

TIMING

Synchronization between TDM devices is maintained by using advanced clock distribution mechanisms. The clocking options are:

• Internal – the master clock source for the TDM circuit is provided by the IPmux-1E internal clock oscillator
• Loopback – the transmit clock is derived from the E1/T1 port receive clock
• Adaptive – the clock is recovered from the Ethernet network interface
• External – an external clock source is used to synchronize the units with E1 or T1 user interfaces via their station clock ports.

The external clock port serves for out-of-band synchronization.
 

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