SAGEM-LINK F 288055571-04
Installation and Operation Manual
Page 26/142
Issue 04 : July 2005
Reproduction and communication prohibited without the written permission of Sagem Communication
E1 Tributaries Connections
The four DB25 connectors in IDU front panel correspond to four x 4 Input/output 2 Mbit/s access (E1).
When Ethernet option is installed, additional E1 tributaries can be used along with Ethernet interface.
Refer to chapter 6 for more information. Depending on configuration, up to 8 E1 tributaries can be
combined with Ethernet transmission.
If the configuration with Ethernet option corresponds to a 28 MHz channel in QPSK mode, or to a 14
MHz in 16QAM mode, then an extra E1 tributary is available. Note that this particular tributary is not
available for all other cases.
Tributary access are available in 120 Ω balanced mode, or in 75 Ω unbalanced mode. Impedance mode
is controlled by the Pilot software.
It is possible to have one connector configured in balanced mode, while the others are configured in
unbalanced mode.
It is not possible to have on the same DB25 connector two tributaries in a different mode.
Tributary connector pinout corresponding to tributaries 1 to 4 is given in Figure 1.20. The other tributary
connectors have the same pinout.
When Ethernet option is present and when the data rate corresponds to a 28 MHz channel in QPSK
mode, or to a 14 MHz in 16QAM mode, the extra tributary is available on the third connector (Pinout
equivalent as trib #1, the other pins are not connected)
To Next Page
Loading...