Specifications

Chapter 1 Introduction Installation and Operation Manual

1-14 Functional Description IPmux-8/16 Ver. 6.00

For E1/T1, when there are several bundles from different sources at the same

E1/T1 port, the bundle that is used for adaptive clock regeneration for the port is

the first bundle of every port. For example (E1): Bundle number 1 for port 1, bundle

number 32 for port 2, bundle number 63 for port 3, bundle number 94 for port 4,

etc. In this mode the regenerated clock is subject to network Packet Delay Variation

and may not comply with jitter and wander specifications.

Figure 1-12. IPmux-8/16 in Adaptive Timing Mode – E1/T1

Figure 1-13. IPmux-16 in Adaptive Timing Mode – E3/T3

Bundle Redundancy

IPmux-8/16 features a bundle redundancy capability. This feature enables the user

to backup the TDMoIP traffic in case of the bundle connection or TDM interface

failure. This feature enables the user to set different paths for the primary bundle

and for the secondary bundle (different IP networks, different links, different

IPmux units, etc) and thus rely on two routes, which are not influenced by the

same faulty IP/Ethernet conditions.

The redundancy type supported is 1:1 mode: only one bundle is actually

transmitted towards the network while the secondary bundle is on standby.

This mode has a negligible effect on the throughput, but the recovery time of the

system, in case switch/flip occurs, depends on the network elements involved in

the application. In 1:1 mode IPmux-8/16 sends Keep Alive frames (called OAM)

on the standby bundle in order to keep the path active (update tables entries, etc).

For IPmux-16 units with an E3, T3 or CT3 interface bundle redundancy is available if

the E3, T3 or CT3 interface module is installed in slot 3.

Frame Format

The Ethernet frame sent by the IPmux-8/16 is a UDP datagram that transfers E1/T1

payload bytes over IP over Ethernet (UDP payload + CW + UDP header + IP

header + Ethernet header).

The UDP payload size is equal to TDM bytes per frame (TDM bytes/frame

configuration).

Note

Not