This section contains guidelines for wiring and cabling at your site.
When preparing your site for network connections to the Cisco NCS 4216,
consider the type of cable required for each component, and the cable
limitations. Consider the distance limitations for signaling, electromagnetic
interference (EMI), and connector compatibility. Possible cable types are
fiber, thick or thin coaxial, foil twisted-pair, or unshielded twisted-pair
Also consider any additional interface equipment you need, such as
transceivers, hubs, switches, modems, channel service units (CSU), or data
service units (DSU).
Before you begin, read these important notes about cabling:
- The T1/E1 interface module for the Cisco NCS 4216 uses a high-density connector that requires the use of a T1/E1 interface cable and a customer-provided patch panel. For more information, see the Connecting T1/E1 cables section.
- Shielded cables must be used to connect to the DB-25 alarm connector on the fan tray in order to comply with FCC/EN55022/CISPR22 Class A emissions requirements. For information about the fan tray alarm port, see the Connecting the Fan Tray Alarm Port section.
Before you install the Cisco NCS 4216, have all the additional external
equipment and cables on hand. For information about ordering, contact a Cisco
customer service representative.
The extent of your network and the distances between the network
interface connections depend in part on the following factors:
- Signal type
- Signal speed
- Transmission medium
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 a guideline in planning your network connections
>prior to installing the Cisco NCS 4216.
If wires exceed the 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 cal surge suppression and