NetComm V85 manual Straight and crossover cable configuration, Straight-Through Cabling

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Straight and crossover cable configuration

There are two types of the wiring: Straight-Through Cables and Crossover Cables. Category 5 UTP/ STP cable has eight wires inside the sheath. The wires form four pairs. Straight-Through Cables has same pinouts at both ends while Crossover Cables has a different pin arrangement at each end.

In a straight-through cable, wires 1,2,3,4,5,6,7 and 8 at one end of the cable are still wires 1~8 at the other end. In a crossover cable, the wires of 1,2,3,6 are reversed so that wire 1 become 3 at the other end of the cable, 2 becomes 6, and so forth.

To determine which wire is wire 1, hold the RJ-45 cable tip with the spring clip facing towards the ground and the end pointing away from you. The copper wires exposed upwards to your view. The ﬁrst wire on the far left is wire 1. You can also refer to the illustrations and charts of the internal wiring on the following page.

Straight-Through Cabling

	Figure 3

Wire	Becomes
1	1
2	2
3	3
6	6

Cross-Over Cabling

			Figure 4

		Wire	Becomes
		1	3
		2	6
		3	1
		6	2

Note:	To prevent loss of signal, make sure that the length of any twisted-pair
	connection does not exceed 100 metres.

58	V85 Desktop VoIP Phone User Guide
	YML772 Rev1

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Contents Page Contents Appendix a Chaper 1 Introduction About VoIPPSTN-to-VoIP Services What is SIP?Before you begin Getting to know yourMinimum Requirements Package Contents Rear LANInstallation Environment Getting your V85 Up and RunningGetting the V85 up and running Connecting yourDown Connecting to the V85 Configuration Page on your PC Check the V85 IP addressConfiguring your VoIP Account Details Phone Number PasswordVoIP account authentication ID SIP Domain NameReboot Stun ServerChecking Your V85 Status Configuring your V85 via the Keypad Keypad Function Definition+OUT VOL Summary of Key Functions and DisplaysVOL+ SpeakerTXT ↔ NUM NETMessage TransferPhone Book Speed Dial M1 M10Static IP Method Further Network Configuration OptionsDynamic IP Method Dhcp PPPoE MethodVoIP SIP Configuration Network Settings VerificationOptional VoIP Configuration Phone Ping utility Network settingsKeypad View Operation RestartBusy Forward Call Forward ConfigurationImmediate Forward No Answer ForwardV85 Web-based Configuration Web LoginBasic V85 Network MenuOthers SIP Parameters SIP ConfigurationStun Public IP Addr Call Forward ModePort Forwarding Support Immediate ForwardAdvanced SIP parameters Phone Configuration VoiceUpgrade System ConfigurationChange Keypad and Web Login Password Call Handling Configuring Call Forward using Web Configuration Configuring Call Forward using the KeypadBlind Transfer Call TransferConsultation Transfer Phone Book Call HoldPhone Book and Speed Dial Speed DialAppendix a V85 Keypad Configuration Menu Structure Figure A-1Figure A-2 Figure A-3 Figure A-4 Appendix B V85 Status and Error Messages Message IndicatesWindows 2000 PCs Appendix C Setting your Computer’s IP AddressWindows XP PCs Windows Me PCsWindows 95, 98 PCs Supplied CD-ROM Appendix D Alternative V85 Connection Types Figure D-1Examples of V85 Port-Forwarding Configuration Figure D-3RTP range is 20000 ~ Appendix E Summary of Key Features and Hardware VoIP Standards ComplianceHardware Specifications 100BASE-T Appendix F Glossary of Network and VoIP Terms10BASE-T AdslDNS DhcpDSL GRE FTPGGP HttpLED ISPLAN NATPots NICPPP Snmp RIPSdns TCPUSB TftpTTL VCIWeb site WebWWW 10Mbps Appendix G Cable InformationRJ-45 Network Ports 100MbpsStraight-Through Cabling Straight and crossover cable configurationCross-Over Cabling Copyright Information Appendix H Registration and Warranty InformationContact Information Customer InformationProduct Warranty Limitations of Warranty