Cisco 2851 - Integrated Services Router Технічний паспорт - Сторінка 6
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Feature
Dynamic Multipoint VPN
(DMVPN)
URL filtering
Cisco Router and Security
Device Manager (SDM)
IP Telephony Support—Features and Benefits
The Cisco 2800 Series allows network managers to provide scalable analog and digital telephony without investing in a one-time solution
(refer to Table 4 for more detail), allowing enterprises greater control of their converged telephony needs. Using the voice and fax modules,
the Cisco 2800 Series can be deployed for applications ranging from voice-over-IP (VoIP) and voice-over-Frame Relay (VoFR) transport to
robust, centralized solutions using the Cisco Survivable Remote Site Telephony (SRST) solution or distributed call processing using Cisco
Call Manager Express (CME). The architecture is highly scalable with the ability to support up to 12 T1/E1s trunks, 52 foreign-exchange-
station (FXS) ports, or 36 foreign-exchange-office (FXO) ports concurrent with data routing and other services.
Table 4.
IP Telephony Support—Features and Benefits
Feature
Benefit
IP phone support
EVM module slots
PVDM (DSP) slots on
motherboard
Integrated call processing
Integrated voice mail
Broad range of voice
interfaces
Support of Survivable
Remote Site Telephony
(SRST) Feature
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Benefit
DMVPN is a Cisco IOS Software solution for building IPsec + generic routing encapsulation (GRE) VPNs
in an easy and scalable manner.
URL filtering is available onboard with an optional content-engine network module or external with a PC
server running the URL filtering software.
This intuitive, easy-to-use, Web-based device-management tool is embedded within the Cisco IOS Software
access routers; it can be accessed remotely for faster and easier deployment of Cisco routers for both WAN
access and security features.
Optional support for Cisco in-line power distribution to Ethernet switch network modules and HWICs can
be used to power Cisco IP phones.
Extension Voice Module Slots, available only on the Cisco 2821 and Cisco 2851, provide support for the
Cisco High-Density Analog and Digital Extension Module for Voice and Fax, providing support for up to
24 total voice and fax sessions without consuming a Network Module Slot.
DSP (PVDM2) modules deliver support for analog and digital voice, conferencing, transcoding, and secure
Real-Time Transport Protocol (RTP) applications.
Cisco CME is an optional solution embedded in Cisco IOS Software that provides call processing for Cisco
IP phones. Cisco CME delivers telephony features similar to those that are commonly used by business users
to meet the requirements of the small to medium-sized offices.
Support for up to a 100 mailboxes using the Cisco Unity
the integration of an optional voice-mail AIM or network module.
Interfaces for local telephone, private branch exchange (PBX), and gateway connections include FXS; FXO;
direct inward dialing (DID); ear and mouth (E&M); Centralized Automated Message Accounting (CAMA);
ISDN Basic Rate Interface (BRI); and T1, E1, and J1 with ISDN Primary Rate Interface (PRI); QSIG; and
several additional channel-associated-signaling (CAS) signaling schemes.
Branch offices can take advantage of centralized call control while cost-effectively providing local branch
backup using SRST redundancy for IP telephony.
© 2004 Cisco Systems, Inc. All rights reserved.
®
Express voice messaging system is possible with
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