Specifications

Chapter 1 Introduction IPmux-1/1E Installation and Operation Manual
1-16 Functional Description
IP/Ethernet
IPmux-1
E1/T1
E1/T1
IPmux-1
E1/T1
E1/T1
Adaptive Mode
Loopback
Timing Mode
E1/T1 Device E1/T1 Device
Master Clock
Source Device
Remote Loopback
Timing Device
Figure 1-15. IPmux-1 in Adaptive Timing Mode
IPmux-8/16
LBT
Grooming of FXS
in E1 CAS
ISDN
POTS
ISDN
LBT
V5.1
E1
Grooming
of BRI
Megaplex
ISDN
IP over
Ethernet
Adaptive
IPmux-1E
Adaptive
IPmux-1E
Adaptive
IPmux-1E
Telephone
Switch
Figure 1-16. IPmux-1E in Adaptive Timing Mode
Megaplex can also be connected directly to the network, via its TDMoIP® main link
(ML-IP).
Frame Format
The Ethernet frame sent by the IPmux-1 is a UDP datagram that transfers E1/T1
payload bytes over IP over Ethernet (UDP payload + UDP header + IP header +
Ethernet header). The UDP payload size depends on the connection mode:
• Static mode: The UDP payload size is equal to TDM bytes per frame
(TDM bytes/frame configuration).
• Dynamic CAS mode: The maximum UDP payload size depends on the
number of configured
time slots and is equal to:
[(TS
A
+ 4) x (number of configured
timeslots)] + 4]
where TS
A
= Active timeslot bytes in frame
Active timeslot bytes in frame are the number of bytes per timeslot that are passed
per Ethernet frame.
An Active timeslot is one where a call is detected by monitoring CAS.
The UDP payload size is not fixed–it depends on the number of active time
slots:
[(TS
A
+ 4) x (number of active
timeslots)] + 4]
• CESoIP mode: The UDP payload size is equal to:
[(Configured Packet Delay) x (number of configured
timeslots) x 8] + 12
Note
Note