System Specifications - Cisco 881 Datasheet
Integrated services routers
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Also See for 881:
- Datasheet (13 pages) ,
- Setup and user manual (17 pages) ,
- Datasheet (16 pages)
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Feature
High-performance flexible digital-
signal-processor (DSP) architecture
Table 10.
Feature
Cisco Unified Border Element version
Call-control signaling
ITU standard voice codecs
Cisco Unified Communications
Manager support
Telephony interface signaling support
Voice features
Voice port-specific features
System Specifications
Tables 11 and 12 list the system specifications for the Cisco 880 Series Routers.
Table 11.
Feature
Default DRAM
Maximum DRAM
© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Description
● Channel capacity: Cisco 880 SRST supports up to four voice channels.
● Flexible DSP architecture: There is no need to specify codec complexity at configuration.
An appropriate codec is dynamically selected when a call is established, while allocating DSP
resources optimally.
● Feature upgrades: The DSP architecture allows for addition of new features through simple code
updates.
Cisco IOS Software Features on Cisco 880 Series with Cisco Unified Border Element: Advanced IP Services
Feature Set
Description
Cisco Unified Border Element 7.0 and later are supported.
H.323 Versions 1, 2, 3, and 4, MGCP 0.1 and 1.0, SCCP, and SIP call-control protocols are supported.
G.711, G.729, G.729a/b, G.723.1, G.726, and G.728, which are standards-based compression
technologies that allow transmission of voice across IP, are supported. The G.711 standard employs
64-kbps pulse code modulation (PCM) using either mu-law or a-law. Other codecs employ lower bit
rates.
For SRST features for IP phones, refer to the SRST data sheet at:
http://www.cisco.com/en/US/products/sw/voicesw/ps2169/products_data_sheets_list.html.
Cisco Unified Communications Manager support for analog and digital ports comes with Releases
6.1(3), 7.0(2), and 7.1(3).
Cisco 880 SRST supports the following PSTN trunk signaling protocols:
● FXS loop-start and ground-start signaling
● FXO
● Inbound signaling (such as dual-tone multifrequency [DTMF] and multifrequency support)
● BRI QSIG
Cisco 880 Cisco Unified Border Element supports the following VoIP trunk signaling protocols:
● Up to 15 SIP-to-SIP sessions. (no H.323 support)
Note: The Cisco 880 with Cisco Unified Border Element does not include DSP feature support such as
transcoding or transrating.
Note: The Cisco 880 with Cisco Unified Border Element does not support concurrent operation of
SRST or Cisco Unified Communications Manager Express.
● Echo cancellation: This feature cancels echo on tail circuits up to 64 msec (configurable tail length).
● Silence suppression and VAD: Bandwidth is used only when someone is speaking. During silent
periods of a phone call, bandwidth is available for data traffic.
● Comfort-noise generation: This feature reassures the phone user that the connection is being
maintained, even when no voice packets are being transmitted.
● Caller ID support: Per-port caller ID (with per-call unblocking) is configurable over analog FXS.
● Dial-plan mapping: This feature simplifies configuration and management through automatic
mapping of dialed phone numbers to IP addresses.
● FXS: FXS provides battery polarity reversal detection and initiation for disconnect supervision and
far-end answer supervision.
● ISDN BRI network side and phantom power: The BRI port provides the ability to connect a PBX or
PABX configured as user side directly to the router. It also provides phantom power to
accommodate equipment that requires it.
● LED indicators show voice-processing resources and port status.
System Specifications
Description
● 256 MB on Cisco 880 Series data models
● 512 MB on Cisco 880 Series WLAN, embedded 3G wireless WAN (WWAN), Voice and
SRST/Cisco Unified Border Element models
● 768 MB on Cisco 880 Series data, voice and Cisco Unified Border Element models
Page 13 of 23
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