Cisco WS-C2950-24 Hardware Installation Guide - Page 75
Preparing for Network Connections, Ethernet Connections, Configuring Serial Connections
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Chapter 2 Preparing for Router Installation Network Cabling Specifications Preparing for Network Connections When setting up your router, consider distance limitations and potential electromagnetic interference (EMI) as defined by the applicable local and international regulations. Network connection considerations are provided for several types of network interfaces and are described in the following sections: • Ethernet Connections, page 2-9 • Serial Connections, page 2-9 • ISDN BRI Connections, page 2-11 • CSU/DSU Connections, page 2-12 See the following online document for more information about network connections and interfaces: • Cisco Modular Access Router Cable Specifications Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Statement 1021 Ethernet Connections The IEEE has established Ethernet as standard IEEE 802.3. Cisco 2900 series routers support the following Ethernet implementations: • 1000BASE-T-1000 Mb/s full-duplex transmission over a Category 5 or better unshielded twisted-pair (UTP) cable. Supports the Ethernet maximum length of 328 feet (100 meters). • 100BASE-T-100 Mb/s full-duplex transmission over a Category 5 or better unshielded twisted-pair (UTP) cable. Supports the Ethernet maximum length of 328 feet (100 meters). • 10BASE-T-10 Mb/s full-duplex transmission over a Category 5 or better unshielded twisted-pair (UTP) cable. Supports the Ethernet maximum length of 328 feet (100 meters). See the Cisco Modular Access Router Cable Specifications document at Cisco.com for information about Ethernet cables, connectors, and pinouts. Serial Connections Serial connections are provided by WAN interface cards and network modules. Before you connect a device to a serial port, you need to know the following: • Type of device, data terminal equipment (DTE), or data communications equipment (DCE), you are connecting to the synchronous serial interface • Type of connector, male or female, required to connect to the device • Signaling standard required by the device Configuring Serial Connections The serial ports on the asynchronous/synchronous serial network modules and the serial WAN interface card use DB-60 connectors. Serial ports can be configured as DTE or DCE, depending on the serial cable used. OL-18712-02 Cisco 2900 Series and 3900 Series Hardware Installation Guide 2-9