Datasheet

ManualsBrandsCisco ManualsNetworking880 Series

Feature

Description

Telephony interface

signaling support

Cisco 880 V supports the following signaling protocols:

●

FXS loop-start and ground-start signaling

●

FXO

●

Inbound signaling (such as dual-tone multifrequency [DTMF] and multifrequency support)

●

BRI QSIG

Voice features

●

Echo cancellation: This feature cancels echo on tail circuits up to 64 msec (configurable tail length).

●

Silence suppression and voice activity detection (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.

Voice port-specific features

●

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 private branch

exchange (PBX) or private automatic branch exchange (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.

Fax and modem

●

Fax and modem pass-through allows fax and modem traffic to pass through a voice port.

●

Fax Relay provides a more robust protocol for fax transmission over packet networks. It also supports the T.37

and T.38 fax protocols.

High-performance flexible

digital-signal-processor

(DSP) architecture

●

Channel capacity: Cisco 880V 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 DSP resources are allocated optimally.

●

Feature upgrades: The DSP architecture allows for addition of new features through simple code updates.

Table 9. Cisco IOS Software Features on Cisco 880 SRST Series: Advanced IP Services Feature Set

Feature

Description

Cisco SRST version

SRST 7.0 and later are supported.

Call-control signaling

H.323 Versions 1, 2, 3, and 4, Media Gateway Control Protocol MGCP 0.1 and 1.0, Skinny Client Control Protocol

(SCCP), and SIP call-control protocols are supported.

ITU standard voice codecs

G.711, G.729, G.729a/b, G.723.1, G.726, and G.728, which are standards-based compression technologies

allowing 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.

Cisco Unified

Communications Manager

support

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).