The Teo ISDN Phones 6210 and 6220 are full-featured, user-friendly ISDN telephones, ideal for today's busy office environments. Automatic set-up capabilities and simple programming make the phones quick to install and easy to use. Reliable and never obsolete, new feature enhancements and upgrades can be added easily.

The 6210 model is equipped with 10 keys (expandable to 40 keys), and the 6220 model has 20 keys (expandable to 50 keys). Both are available with a "U" interface (built-in NT1), or an "S/T" interface. Optional terminal adapters are available.

"S/T" models are powered by PS1 (phantom) or PS2 (pins 7 and 8) power over the ISDN line cord. Power is typically supplied by the NT1."U" models can be locally powered, or remotely powered by a bulk supply using PS2 power over the ISDN line cord. Power supplies are available separately.Both the 6210 and 6220 models are on the DSN Approved Products List. Products on this list have received Joint Interoperability Certification (JIC) and Information Assurance Accreditation (IAA) from the Defense Information System Network (DISN) Designated Approval Authorities (DAA) in accordance with the Department of Defense Instruction DoDI 8100.3