Cisco Systems ASR 903 manual Site Cabling Guidelines, Electrical Circuit Requirements, 2-13

Chapter 2 Preparing for Installation

Site Planning

The maximum power draw of the Cisco ASR 903 Router chassis and its configurable hardware components are listed in the following table. The maximum power draw values are not affected by whether the router chassis contains 1 or 2 power supplies AC or DC.

Hardware component(s)	Maximum power draw value
Router chassis with 2 power supplies, 1 fan tray, and 1 RSP1A	195 W
Router chassis with 2 power supplies, 1 fan tray, and 1 RSP1B	210 W
A900-RSP1A-55 (standby)	100 W
A900-RSP1B-55 (standby)	100 W
A900-IMA1X (1-port 10 GE XFP interface module)	13.0 W
A900-IMA8T (8-port 1 GE RJ45 interface module)	17.5 W
A900-IMA8S (8-port 1 GE SFP interface module)	17.5 W
A900-IMA16D (16-port T1/E1 interface module)	14.5 W
A900-IMA4OS (4-Port OC3 interface Module)	26 W

Electrical Circuit Requirements

Each Cisco ASR 903 Router requires a dedicated electrical circuit. If you equip it with dual power feeds, provide a separate circuit for each power supply to avoid compromising the power redundancy feature.

The Cisco ASR 903 Routers can be powered by a DC source or an AC source. Ensure that equipment grounding is present and observe the power strip ratings. Make sure that the total ampere rating of all products plugged into the power strip does not exceed 80% of the rating.

For more information about the Cisco ASR 903 Router power supply, see the “Power Supply Features” section on page 1-3.

Site Cabling Guidelines

This section contains guidelines for wiring and cabling at your site. When preparing your site for network connections to the Cisco ASR 903 Router, 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 cabling.

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 ASR 903 Router 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 “Connecting T1/E1 cables” section on page 3-40.

•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 “Connecting the Fan Tray Alarm Port” section on page 3-42.

Before you install the Cisco ASR 903 Router, have all the additional external equipment and cables on hand. For information about ordering, contact a Cisco customer service representative.

	Cisco ASR 903 Router Hardware Installation Guide
OL-25178-04		2-13