Dimetra EBTS Site Controller » History » Revision 4
Revision 3 (laforge, 02/19/2016 10:52 PM) → Revision 4/12 (laforge, 02/19/2016 10:52 PM)
[[PageOutline]] = Integrated Site Controller (CLN1480A) = This is a unit that interfaces up to 8 Base Radios with the core network of the Dimetra TETRA network (SwMI). Hardware-wise, it is a PowerPC based system, looking very much like an old-fashioned PC mainboard with both ISA and PCI slots. The mainboard houses the PowerPC CPU and it has slots for RAM. There are some extension cards plugged into the system: * Clock generation card (ISA, full length). * has an integrated GPS receiver, to which you attach a GPS antenna * generates the reference 5MHz clock distributed over Coaxial cable to the Base Radios * Ethernet Card using DEC tulip chipset (PCI) * This card is what talks to the Base Radios (BR) via 10-Base-2 * Unknown card with RJ-45 jack (REDUND) on the back. Might be E1 There are further inputs and outputs on the system: * A DB-15 jack for X.21 synchronous serial backhaul (2048Mbps) * FIXME * A RS-232 serial port for local configuration == Images == === Site Controller top view (lid removed) === [[Image(tetra_site_controller_open.jpg, 66%)]] === PCI Card with lots of Lucent chips === [[Image(tetra_site_controller_lucent_pcb_top.jpg, 33%)]] [[Image(tetra_site_controller_lucent_pcb_bottom.jpg, 33%)]]