Channelized DS1, more commonly referred to as integrated T1, is a DS1 (T1) line comprised of 24 (64Kbps each) autonomous channels. Each of these independent channels can support different applications simultaneously. For example, one channelized DS1 line, depending on availability in your area, can bundle any combination of the following applications: local telephone service, long distance, incoming toll free, internet, fax, and/or VoIP. Channelized DS1 is very popular with small and medium sized businesses which both access the internet and use 4 or more phone lines.