Comtech EF Data SLM-5650A - Manual (Page 415)

SLM-5650A Satellite Modem Revision 8
Appendix E MN-SLM5650A
E–11
E.3.3 BPM Mode in Hub Data Traffic Networks
Figure Legend
Equipment Data Type
1 TDM Modem A STDMA Return Link
2 Hub LAN Data Switch B Forward Link
3 Hub router C Network Encryption
4 Other Devices D MAC Learning Disabled (Entire Switch)
5 Hub Demodulator Data Switch E SCPC Return #1
6 Demodulator #1
F SCPC Return #2
7 Demodulator #2 G SCPC Return #N
8 Demodulator #N
Figure E-7. Hub Data Traffic Network
In a point-to-multipoint system, at the hub a split-path topology is used and traffic in the Forward
Link and Return Link directions may be processed by different SLM-5650A modems.
Figure E-7 shows a typical Hub Data Traffic Network for one Layer 2 Network (‘P1/P2/A’
shown in red). The other two networks (‘P3/P4/B’ shown in blue and ‘P5/C’ shown in green) can
be used in a similar fashion.
Note that the Hub Demodulators used in this configuration are SLM-5650A modems configured
for operation with the optional ‘Demodulator only’ FAST Feature enabled.