RAD Data comm IPmux-16 Manuel D’Utilisation

IPmux-16 Installation and Operation Manual 

Chapter 1  Introduction 

Functional Description 

1-7 

Bundles composed of several timeslots (E1: 1-31, T1: 1-24) can be defined. Each 
bundle can be connected to a different destination bundle anywhere on the 

network.  
Up to 496 sub-E1 or 384 sub-T1 remote bundles can be attached to one central 

IPmux-16. Multibundling enables concentrating many remote sites with few 
timeslots to the same TDM channel at the central site. A mesh topology 

application, in which the bundles at each site are defined to connect to several 
sites, is also supported. 

IPmux-16 operation modes are: 
•  Unframed  
•  Fractional 
•  Fractional with CAS 

In the transparent mode, the incoming bit stream from each port (regardless of 
framing) is converted into IP over Ethernet frames. This option provides clear 

channel end-to-end service. 

In the fractional mode, the incoming bit stream is regarded as a sequence of  

nx64 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 time slots and not the whole 

E1/T1 as in transparent mode. 

In the fractional-with-CAS mode, the structure block (as described under 
Fractional Operation Modes, above) also includes Channel Associated Signaling 

(CAS). 

Diagnostic capabilities include E1/T1 local and remote loopback tests for rapid 

location of faults. Any of the E1/T1 ports can be looped locally toward the line, or 

toward the remote end (see Chapter 4 for more information). 

The E1/T1 Transmit (TX) clock can operate in several timing modes to provide 

maximum flexibility for connecting the IPmux-16 E1/T1 interface. 
The available timing modes are: 
•  Loopback: The E1 or T1 Transmit clock is derived from the E1/T1 Receive 

clock.