Electrical Circuit Requirements; Site Cabling Guidelines - Cisco ASR 907 Hardware Installation Manual

Electrical Circuit Requirements

Hardware component(s)
A900-IMA3G-IMSG (1-port OC-48/STM-16 or 4-port OC-12/OC-3 /
STM-1/STM-4 + 12-port T1/E1 + 4-Port T3/E3 CEM Interface Module)
Electrical Circuit Requirements
Each Cisco ASR 907 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 907 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 907 Router power supply, see the

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 907 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 907 Router uses a high-density connector that requires
• Shielded cables must be used to connect to the RJ-45 alarm connector on the fan tray in order to comply
Before you install the Cisco ASR 907 Router, 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 ASR 907 Router.
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 electrical surge
suppression and shielding.
Cisco ASR 907 Router Hardware Installation Guide
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the use of a T1/E1 interface cable and a customer-provided patch panel. For more information, see
Connecting T1/E1 Cables.
with FCC/EN55022/CISPR22 Class A emissions requirements. For information about the fan tray alarm
port, see Connecting the Fan Tray Alarm Port.
Preparing for Installation
Maximum power draw value
55 W
Power Supply Features.