We use a Telos Zephyr codec (layer II and layer III compatible)
and we are anEDNet affiliate. We can connect to any codec in the world

ISDN Pricing
$90.00 first half hour
$45,00 each additional half hour

ISDN (International Standard Digital Network) is a high bandwidth digital phone line capable of transmitting audio and video of very high quality.

Codec: The device which connects the ISDN line to the audio control room.