Specifications

IPmux-11 Installation and Operation Manual Chapter 1 Introduction
Functional Description 1-5
1.3 Functional Description
IPmux-11 provides TDM connectivity across the IP/Ethernet network. A single
bundle (group of timeslots) can be transmitted to a predefined far-end bundle.
IPmux-11 supports ICMP (ping), and generates ARP in case of unknown next hop
MAC addresses, answers ARP requests, and supports 802.3 VLAN Ethernet format.
IPmux-11 includes E1 or T1 port. Traffic is transmitted over the network as E1/T1
or fractional E1/T1, using the TDMoIP method.
IPmux-11 supports two Ethernet user ports for user LAN connectivity.
Configuration and management are provided via the IPmux-11 local terminal,
Web-based management utility, Telnet or RADview management tool (SNMP).
Operation Modes
This section describes theIPmux-11 operation modes, which are:
• Unframed
• Fractional
• Fractional with CAS.
Unframed (Transparent)
In the transparent mode, the incoming bit stream from each channel (regardless of
framing) is converted into IP over Ethernet frames. This option provides clear
channel end-to-end service (unframed).
Fractional
In the fractional mode, the incoming bit stream is regarded as a sequence of
N × 64 kbps channel groups (according to framing). Each predefined group of
channels is converted into a structure block. The structure block is packetized into
IP frames and transmitted.
This mode allows transmission of several selected timeslots without the whole E1
or T1 frame, as in transparent mode.
Fractional with CAS
In the fractional-with-CAS mode, the structure block (as described under
Fractional Operation Modes, above) also includes Channel Associated Signaling
(CAS) from timeslot 16 (E1) or robbed bit (T1). The relevant portion of the signaling
channel is packetized and sent to the destination.
Timeslot Assignment in a Bundle
A bundle is a group of timeslots associated with a specific E1 or T1 channel.
IPmux-11 places individual or multiple TDM timeslots (up to 31 timeslots for E1 or
up to 24 for T1) into bundles with a single IP address destination.