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Item#: C881SRSTW-GN-E-K9 Cisco Router

Product detail: Cisco SRST881 ENet FXS - FXO Sec Router 802.11n ETSI CompC881SRSTW-GN-E-K9

Product Overview

C881SRSTW-GN-E-K9 Overview

The Cisco 880 voice platforms (C880SRST and C880SRSTW) support the following voice features:

  • Signaling protocols: Session Initiation Protocol (SIP), Media Gateway Control Protocol (MGCP), and H323
  • Real-time transfer protocol (RTP), Cisco RTP (cRTP), and secure RTP (SRTP) for these signaling protocols
  • Fax passthrough, Cisco fax relay, T37 fax store-and-forward, and T.38 fax relay (including T.38 gateway-controlled MGCP fax relay)
  • Dual tone multifrequency (DTMF) Relay—OOB and RFC2833
  • Silence suppression/comfort noise
  • G.711 (a-law and u-law), G.729A, G.729AB, G.729, G.729B, G.726
  • Support of SRST failover to a Foreign Exchange Office (FXO) or BRI backup port connected to PSTN in case of WAN failure
  • Direct inward dialing (DID) on FXS

The 10/100-Mbps fast Ethernet models of the Cisco 881 Integrated Services Routers combine Internet access, security and wireless services onto a single, secure device. This router offers broadband speeds and simplified management to small businesses, and enterprise small branch and teleworkers.

Available options on the Cisco 881 Integrated Services Router include:

  • Survivable Remote Site Telephony for teleworker and small branch voice
  • Built-in advanced security, including intrusion prevention, GET VPN, dynamic multipoint VPN (DMVPN) for up to 20 site-to-site VPN tunnels
  • Cisco Configuration Professional for simplified management
  • WAN connection with multiple access options
  • Business continuity with primary and backup connections on the Cisco 880 router, including third-generation wireless and ISDN

Tech Specs

C881SRSTW-GN-E-K9 Specifications

The Cisco® 880 Series Integrated Services Routers combine Internet access, security, voice, and wireless services onto a single, secure device that is simple to use and manage for small businesses and enterprise small branch offices and teleworkers. The Cisco 880 Series delivers features including firewall, content filtering, VPNs, and wireless LANs (WLANs) at broadband speeds to small offices. Easy deployment and centralized management features help enable enterprises or service providers to deploy the Cisco 880 Series in small branch offices or small businesses.

Back Panel of the Cisco C881SRST-W Voice Router


Primary WAN port1—10/100 FE


Antenna—captive wireless omnidirectional dipole WLAN antenna (wireless models only)


Voice ports—four FXS2/DID3ports, one FXO4port with TBP5power failover


Reset button


4-port 10/100 Ethernet switch6


Power connector


Serial port—console or auxiliary


Earth ground connection


PoE power connector for optional PoE module7


Kensington security slot

1Depending on the router model, the primary WAN port can be either G.SHDL or 10/100 FE.

2FXS=Foreign Exchange Station.

3DID=Direct Inward Dialing.

4FXO=Foreign Exchange Office.

5TBP=trunk bypass.

6Ports 0 and 1 provide PoE with the optional PoE module installed.

7The Cisco 880 series ISRs can include an optional PoE module that provides power to 802.3af-compliant devices connected to ethernet ports 0 and 1. If this feature was not configured with the factory order, SKU 800-IL-PM-2, you must order and install it to enable the PoE function. The PoE power supply, SKU 800-ILPM-4, is also required.

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