This section contains guidelines for wiring and cabling at your site. When preparing your site for network connections to the Cisco Remote-PHY Compact Device Shelf, consider the type of cable required for each component, and the cable limitations. Consider the distance limitations for signaling, EMI, and connector compatibility. Possible cable types are fiber, thick or thin coaxial, foil twisted-pair cabling, or unshielded twisted-pair cabling.
Also consider any additional interface equipment you need, such as transceivers, hubs, switches, modems, channel service units (CSUs), or data service units (DSUs).
Before you install the Cisco Remote-PHY Compact Device Shelf, have all the additional external equipment and cables at hand. For ordering information, contact a Cisco customer service representative.
The extent of your network and the distances between network interface connections depend in part on the following factors:
The distance and rate limits referenced in the following sections are the IEEE-recommended maximum speeds and distances for signaling purposes. Use this information as guidelines when planning your network connections prior to installing the Cisco Remote-PHY Compact Device Shelf.
If wires exceed recommended distances, or if wires pass between buildings, give special consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic devices. If you have had problems of this sort in the past, you may want to consult experts in electrical surge suppression and shielding.