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Vmux-2100 Installation and Operation Manual Chapter 4 Management from a Terminal
Configuring Main Link and Voice E1/T1 Ports 4-27
Function:
TDMoIP
Max Bytes In Multiplexed Frame (size of a multiplexed TDMoIP frame in
bytes):
100 to 1461 bytes
Destination IP (IP address of the destination group)
Destination Bundle (number of destination bundle of the group with IP
specified in the previous step)
Packetizing Interval (msec) (time interval allotted for the TDMoIP frame
aggregation):
10 to 90 msec
Connectivity parameters – keep-alive messages configuration
(see Figure 4-34):
Connectivity Parameters
1. Connectivity-packet rate (sec) [1 - 60]... (60)
2. Connectivity timeout cycles [1 - 5] ... (3)
@ - Db Update; # - Db Undo
ESC-prev.menu; !-main menu; &-exit
Figure 4-34. Connectivity Parameters Menu
Vmux-2100 constantly monitors status of all connected bundles by sending
the 64-byte keep-alive messages to remote device. Connectivity is
confirmed by receiving a reply from the remote unit. This process is similar
to pinging remote IP hosts. If reply is not received, usually due to the main
link failure, Vmux-2100 disconnects the bundle and generates the BUNDLE
IS OOS alarm. When the BUNDLE IS OOS alarm is generated, Vmux-2100
notifies appropriate PBX by sending “all 1s” string (CCS signaling) or OOS
message (CAS signaling) on all timeslots of the disconnected bundle. This
notification allows the attached PBX to stop transmitting over a faulty E1
and switch to a backup link.
You can specify the following connectivity parameters:
Connectivity packet rate (frequency of sending the keep-alive packets,
from one packet per 1 second to one packet per 60 seconds)
Connectivity timeout cycles (number of attempts within which
Vmux-2100 expects to receive at least one reply from the remote
device).
For example, if you set the connectivity packet rate to 60 seconds and
connectivity timeout to 3, Vmux-2100 disconnects a bundle from which it
did not receive at least one reply within 180 seconds.