2-7
Cisco Connected Grid Routers 2010 Hardware Installation Guide
OL-21559-01
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 2-7
• Serial Connections, page 2-7
See the following 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 2010 CGR support the following
Ethernet implementations:
• 1000BASE-X—1000 Mb/s full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable (IEEE 802.3z). Supports the Ethernet maximum length of 328
feet (100
meters).
• 1000BASE-T—1000 Mb/s full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable (IEEE 802.3ab). Supports the Ethernet maximum length of 328
feet (100
meters).
• 100BASE-TX—100 Mb/s full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable (IEEE 802.3u). Supports the Ethernet maximum length of 328
feet (100
meters).
See Cisco Modular Access Router Cable Specifications at www.cisco.com for information about
Ethernet cables, connectors, and pinouts.
Serial Connections
Serial connections are provided by the grid router WAN interface card (GRWIC). 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 grid router
WAN interface card use an GRWIC-8A/S cable with a DB-25 connector. Serial ports can be configured
as DTE or DCE, depending on the serial cable used.
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