NK8000 Network planning68Building Technologies DMS8000_Application_Specification_&_Planning_MP4.10_A6V10063710_a_enFire Safety & Security Products 06.20075.4 Datalink characteristics5.4.1 LONLON transceiver type: FTT-10 topology:– Doubly terminated bus topology– Free topologySpeed: 78kbps (given by FTT-10)Cable type: any kind of twisted pair cable, UTP (Unshielded Twisted Pair) preferredCable length: Depends on cable quality– Typ. 1’400m for doubly terminated bus topology (UTP Category 3), up to 2’400mwith perfect cabling– Typ. 500m for free topology (UTP Category 3)Max. nodes per segment: 64Max. nodes per sub-network: 128Max. number of repeaters per sub-network: 4 (5 segments)Detailed specifications:http://www.echelon.com/Support/documentation/Section: Engineering Bulletins → Media & Wiring5.4.2 Serial interface (RSxxx)Transceiver Media Max. Nodesper SegmentTopol-ogyMax.SpeedConnectorTypeMax. Distancewithout spe-cial HWRemarks URLRS 232 3 wires point-to-point PTP 115kbps D-Sub 9D-Sub 25RJ 4515 Meter www.phoenixcontact.dewww.wut.deRS 422 2 twistedpairspoint-to-point PTP 1Mbps* 1km* * speed-distancetrade-offRS 485master-slave1 twistedpair~32, dependingon addressingbus 1Mbps* 1km* * speed-distancetrade-offRS 485 2 twistedpair~32depending onaddressingbus 1Mbps* 1km* * speed-distancetrade-off5.4.3 ModemsTransceiver Media Max. Nodesper SegmentTopol-ogyMax.SpeedConnectorTypeMax. Distancewithout spe-cial HWRemarks URLTele-phoneLine cat.3point-to-point PSTN 56kbpsanalog64 kbpsISDN basicrate Inter-faceWorld-wideover the PSTN(publicswitched tele-phone network)www.westermo.sewww.blackbox.comwww.zyxel.comWireless GSM World-wideover the GSM(Global Systemfor Mobilecommunica-tions)