Specifications

Chapter 1 Introduction IPmux-1/1E Installation and Operation Manual
1-12 Functional Description
Timeslot Assignment in a Bundle
A bundle is a group of timeslots associated with a specific E1 or T1 channel.
IPmux-1/1E places individual or multiple TDM timeslots (up to 31 (E1) or 24 (T1)
timeslots) into bundles with a single IP address destination.
ISDN BRI
The timeslot assignment in a bundle for IPmux-1E with ISDN BRI (when working
opposite IPmux with E1/T1 or Megaplex) is as follows:
B1
B2 D
First Channel
MSB Bits 7, 6 contain
D channel information
B1
B2 D
Second Channel
…
MSB Bits 7, 6 contain
D channel information
Figure 1-10. Timeslot Assignment in a Bundle, for IPmux-1E/ISDN
As shown in Figure 1-10, the four ISDN BRI channels consume 12 timeslots in the
bundle. The E1/T1 IPmux should work in framed mode (no CAS).
The three TS groups in the bundle are assigned according to ISDN BRI channel
numbers; the first group is assigned to the lowest ISDN BRI channel that is
enabled, etc.
FXS/FXO/E&M
The timeslot assignment in a bundle with analog (FXS/FXO/E&M) is straightforward.
Each timeslot in a bundle is assigned to a specific analog channel according to
analog channel numbers; the first timeslot is assigned to the lowest analog channel
that is configured, etc.
The E1/T1 TDMoIP® gateway that works opposite the analog channels should work
in Framed with CAS mode.
Bundle Redundancy
IPmux-1/1E features a bundle redundancy capability. This feature enables the user
to backup the TDMoIP® traffic in case of fault at the bundle connection level
and/or the TDM level. This feature permits the user to set a different path for the
primary bundle and for the secondary bundle (different IP networks, different
links, different IPmux units, etc) and thus rely on two routs, which are not
influenced by the same faulty IP/Ethernet conditions.
The triggers for the bundle flip are user configurable in terms of number of events
and the time period in which the events will be counted. The user can configure
thresholds for both the TDM physical error levels and the Bundle connection error
level. The first threshold that will be breached will trigger a redundancy flip.
Note