Group 4 Protocols
Definition - What does Group 4 Protocols mean?
Group 4 protocols are a protocol suite used to send fax documents over ISDN networks supporting images up to 400 dpi resolution. It is designed for FAX transmissions between ISDN 64 kbps systems and for using protocols.
Techopedia explains Group 4 Protocols
Group 4 Protocols include the following protocols: