Specifications

CHAPTER

1-1

Cisco IOS Telephony Service, Version 2.02

Cisco IOS Telephony Service Overview

Cisco IOS Telephony Service (ITS) provides basic Cisco IP phone call-handling capabilities in a LAN

environment on the Cisco routers. This service enables the Cisco multiservice routers to act as the

Cisco IOS Telephony Service for the Cisco IP Phone 7960, Cisco IP Phone 7940, Cisco IP Phone 7910,

and Cisco IP Conference Station 7935. This service also helps download phone software images and

configures and manages the Cisco IP phones in your LAN. Cisco IOS Telephony Service provides a

telephony system useful for a small office with a small number of extensions.

Feature Specifications for Cisco ITS, Version 2.02

Feature History

Release ITS Version Modification

12.1(5)YD Version 1.0 • This service was introduced on the Cisco 2600 series and

Cisco 3600 series multiservice routers, and Cisco IAD2420 series

integrated access devices (IAD)s.

• Dial-plan class of restriction (COR)

• Call hold and retrieve

• Call pickup of on-hold calls

• Multiple lines per Cisco IP phone

• Multiple line appearance across telephones

• Call-forwarding functions: all, busy, and no answer

• Call transferring

• Speed dialing

• Cisco IP phones derive the date and time from the router through

Network Time Protocol (NTP)

• Interworking with Cisco gatekeeper

• Distinctive ringing: for external versus internal calls

• Caller identification display and blocking

• Analog Foreign Exchange Station (FXS) and Foreign Exchange

Office (FXO) ports

• On-net calls using Voice over IP (VoIP) H.323, Voice over Frame

Relay (VoFR), and Voice over ATM (VoATM)

• Function keys