A similar version is used as the control channel for E-carrier (E1) and SONET multichannel telephone lines. Cisco HDLC uses low-level HDLC framing techniques but adds a protocol field to the standard HDLC header.
A similar version is used as the control channel for E-carrier (E1) and SONET multichannel telephone lines Cisco HDLC uses low-level HDLC framing techniques but adds a protocol field to the standard HDLC header.