Specifications

Chapter 7 Broadband and Dial Access
7-16
Broadband Cable—Customer Premise Equipment (CPE)
Specifications
For More Information
See the Cisco uBR 3x10 RF Switch Web site:
http://www.cisco.com/en/US/products/hw/cable/ps2929/index.html
Broadband Cable—Customer Premise Equipment (CPE)
1
Cisco uBR905 Series Cable Access Router
The Cisco uBR905 Cable Access Router provides commercial
services for cable operators, allowing them to expand their
broadband service offerings and support IP data transmission over
a cable plant. The Cisco uBR905 offers hardware-accelerated IPSec VPN support.
Feature Cisco RF Switches
Input Power Requirements • AC: 100 to 240 VAC, 50 or 60 Hz, operating range: 90 to 254 VAC
• DC: -48 to -60 VDC, operating range: -40.5 to –72 VDC, 200 mVpp ripple/noise
Environmental • Operational temperature range: 0 to +40°C
• Operating temperature range: -5 to +55°C
Unit Control • 10BaseT Ethernet—SNMP
• Switching time from active (working) to standby (protect): 150 mS maximum
after SNMP command
Connectors • RF connectors: MCX
• AC power: IEC320 type
• DC power: Three terminal block
• Ethernet: RJ-45
• RS-232 Bus: 9-pin male D
Reliability • 41,000 MTBF @ +50°C as calculated by Bellcore 5, 80 percent confidence factor
Physical • Dimensions (H x W x D): 19 x 15.5 x 5.25 in. (48.2 x 384 x 132 cm)
• Weight: 36 lbs (16.4 kg)
RF requirements • Input/output impedance: 75 ohms
• Maximum RF input power: +15 dBm (63.75 dBmV)
• Switch type: Electro-mechanical, absorptive for working path, non-absorptive
on the protect path
• Switch setting time per switch module: 20 ms maximum
• Downstream frequency range: 54 to 860 MHz
• Typical downstream insertion loss: +/-1.1 dB from CMTS to cable plant;
+/- 2.1 dB from protect to cable plant; 5.5 dB from working to output; 8.0 dB
from protect to output
• Downstream insertion loss flatness: +/- 1.1 dB from CMTS to cable plant;
+/- 2.1 dB from protect to cable plant
• Downstream output return loss: >15.0dB at <450 MHz, > 12.0 dB at >= 450 MHz
• Downstream input return loss: >15.0 dB
• Downstream isolation: > 60 dB from channel to channel in working mode;
> 52 dB from CMTS to protect when in protect mode
• Upstream frequency range: 5 to 70 MHz
• Typical upstream insertion loss: 4.1 dB from cable plant to CMTS;
5.2 dB from cable plant to protect
• Upstream insertion loss flatness: +/- 0.4 dB from cable plant to CMTS,
+/- 0.6 dB from cable plant to protect
• Upstream input return loss:> 16 dB
• Upstream isolation: > 60 dB from channel to channel in working mode;
> 60 dB from CMTS to protect when in protect mode
• Protect mode: CMTS return loss >10 dB, cable plant return loss: >10dB
1. Cisco VoIP Residential CPE Partner Program
—To help drive deployment of residential VoIP services to market, Cisco offers
a program that identifies low-cost residential VoIP modems that have passed interoperability testing with Cisco. Cable
service providers should contact their sales representatives for vendors, models, pricing and volume discount
opportunities.