Cisco Cisco IOS Software Release 12.2(2)XK

This document describes the voice and quality of service (QoS) features for asymmetric digital 
subscriber lines (ADSL) on Cisco 2600 and 3600 series routers in Cisco IOS Release 12.2(2)XK. 

For information about QoS features on Cisco 1700 series routers, refer to the following document:

This document includes the following sections: 

Cisco 2600 and 3600 series routers with an ADSL WAN interface card support the integration of voice 
and data over the same ADSL circuit using Voice over IP (VoIP) and Voice over ATM (VoATM). QoS 
features make it possible to effectively combine voice and data traffic in the same WAN connection 
without sacrificing quality and reliability. Service providers can increase revenue by building 
differentiated service options based on premium, standard, or best-effort service classes.

12.2(2)XK

Voice and quality of service features for ADSL were introduced for Cisco 2600 
and 3600 series routers.