ISDN

Rostelecom offers ISDN (Integrated Services Digital Network) traffic delivery to networks of Russian and foreign operators. ISDN enables simultaneous transmission of speech, text, data and video via telephone circuits with guaranteed high quality and reliability of transmission and a wide range of features.

Rostelecom offers the following ISDN services using ISUP Q.767 protocol:

Bearer services

64 kbit/s unrestricted
3.1 kHz audio
Speech

Teleservices

Telephony 3.1 kHz
Telephony 7 kHz
Telefax Group 2/3
Telefax Group 4
Videotelephony

Additionally, complementary services like calling/called line identification/identification restriction, 3G video calls, etc. are offered.