Integrating analogue devices such as fax or door intercom into the IP-network, the tiptel innovaphone 21 perfectly completes the innovaphone product portfolio.

The IP 21 transmits faxes based on the T.38 protocol, thus guaranteeing failsafe transmission and consistent standard conformity. As it only transmits the actual payload information, the IP 21 requires as little bandwidth as a regular, compressed IP telephone call.

Bandwidth requirements range between 10 and 15 kbit, so the IP network is not burdened with large data masses. Analog devices can be connected by using either the TAE telecom plug common in Germany or the international RJ 11 plug.

In some scenarios, it is profitable to integrate analogue telephones into the IP network via the IP 21. A number of special telephone features (explosionor vandalism-proof phones, telephones for visually impaired users, etc.) are not yet covered by IP telephony.

The basic functions call hold, call transfer, call forward, and consultation are all based on the H.450 standard, so that the IP 21 can carry out these functions in cooperation with any H.323- compatible VoIP gateway and gatekeeper. If DECT telephones are integrated, the call number may be transmitted through to the terminal. The IP 21 even offers the option to fine-tune the volume directly on the handset.