There are two types of integrated DS1. Prior to recent technological advancement, which resulted in the availability of dynamic integrated DS1, the only available form of integrated DS1 was channelized integrated. Channelized T1 is comprised of 24 (64 kbps each) autonomous channels. Each of these independent channels can support different applications simultaneously. Once channelized T1 is configured, the channels are fixed. With channelized T1, for example, if 12 of your 24 channels are allocated to local phone service, and the other 12 channels (768 k) are allocated to internet data, then 12 channels will not be available on the data side, regardless of whether one or twelve of the phone lines are in use. With this example, your data speed can never exceed 768 k, regardless of how many phones are, or are not, in use. Some now consider this a waste of bandwidth. With dynamic integrated, all bandwidth is initially assigned to the data side, and then used for phones only when needed.
One integrated 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, and/or VoIP. Integrated DS1 is very popular with small and medium sized businesses that do not want to pay for separate T1 circuits for each of these applications. Other advantages of integrated DS1 can include: one provider, one easy to read bill and one point of contact for all of the above mentioned services, flexibility in keeping your existing phone numbers, much lower costs than if the above mentioned applications are purchased individually, and the flexibility to evolve as your business grows.