Datasheet

Data Sheet

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 connect up to 12 T1/E1s trunks, 52 foreign-

exchange-station (FXS) ports, or 36 foreign-exchange-office (FXO) ports.

Table 4. IP Telephony Support-Features and Benefits

Feature Benefit

IP Phone Support Optional support for Cisco in-line power distribution to Ethernet switch network modules and HWICs

can be used to power Cisco IP phones.

EVM Module Slots 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.

PVDM (DSP) Slots on Motherboard DSP (PVDM2) modules deliver support for analog and digital voice, conferencing, transcoding,

and secure Real-Time Transport Protocol (RTP) applications.

Integrated Call Processing 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.

Integrated Voice Mail Support for up to a 250 mailboxes using the Cisco Unity

Express voice messaging system is

possible with the integration of an optional voice-mail AIM or network module.

Broad Range of Voice Interfaces Interfaces for public switched telephone network (PSTN), private branch exchange (PBX), and key

system connections include FXS; FXO; analog 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; E1 R2; and several additional channel-

associated-signaling (CAS) signaling schemes.

Survivable Remote Site Telephony (SRST) Branch offices can take advantage of centralized call control while cost-effectively providing local

branch backup using SRST redundancy for IP telephony.