Sagem SAGEM-LINK F - Page 116

SAGEM-LINK F 288055571-04
Installation and Operation Manual
Page 116/142
Issue 04 : July 2005
Reproduction and communication prohibited without the written permission of Sagem Communication
For each data rate, the useful bandwidth can be split in two parts dedicated to Ethernet and E1
transmission. For instance, if a 14 MHz channel is used with QPSK modulation, it is possible to
configure the Ethernet and E1 bandwidth as :
• One 100 baseT Ethernet bridge with 17 MHz bandwidth, no E1
• One 100 baseT Ethernet bridge with 15 MHz bandwidth, plus one E1
• One 100 baseT Ethernet bridge with 12.5 MHz bandwidth, plus two E1
• One 100 baseT Ethernet bridge with 8 MHz bandwidth, plus four E1
All possible combinations for all data rates are configurable by the Pilot software. They are
summarized in the table below :
Channel
28 MHz – QPSK*
or
14 MHz - 16QAM*
14 MHz - QPSK
or
7 MHz - 16QAM
7 MHz - QPSK 3.5 MHz - QPSK
Equivalent
nxE1 version
16 E1 8 E1 4 E1 2 E1
Additional
E1
Ethernet
Bandwidth
Additional
E1
Ethernet
Bandwidth
Additional
E1
Ethernet
Bandwidth
E1 Ethernet
Bandwidth
(1E1*) 34 MHz - 17 MHz - 8 MHz - 4 MHz
1 E1+(1E1*) 32 MHz 1 E1 15 MHz 1 E1 6 MHz 1 E1 2 MHz
Ethernet
Version
2 E1+(1E1*) 29.5 MHz 2 E1 12.5 MHz 2 E1 4 MHz
4 E1+(1E1*) 25.5 MHz 4 E1 8 MHz
6 E1+(1E1*) 21 MHz
8 E1+(1E1*) 17 MHz
Table 6.1 : Ethernet / E1 configurations
*Note : For the highest data rate case (equivalent to 16 E1 version), there is one extra E1 available.
This access is located in the third dB25 connector labeled "Extra Trib". On the Pilot software this
particular tributary is labeled always as "Trib 9".
This particular tributary is not available for the other data rates. Its bandwidth cannot be
transferred to the Ethernet bandwidth.
The 100 baseT access is available on the RJ45 connector labeled "100 bT", while the E1 access are
available on the DB 25 tributary connectors (refer to Chapter 1, sections 1.9.1 and 1.9.3).
100BaseT
Tribs 1-4
Tribs 5-8
Extra Trib (Trib #9)
Ethernet configuration is made from the SAGEM-LINK F Pilot main screen
Depending on the radio channel bandwidth available (3.5, 7 MHz, 14 MHz or 28 MHz) and on the
modulation scheme (QPSK / 16 QAM), the user can choose to use all transmission resources for