Zhone Technologies IMACS-200 manual Type II E&M Signaling

Figure 7-2illustrates a Type II E&M signaling interface where the connecting equipment (normally a PBX or other inter-office carrier systems) originates on the M-lead. The connecting equipment provides a contact closure between the M and SB leads at the interface to send an 0ff-hook (originate) and an open between the M and SB leads at the interface to send an on-hook. The IMACS-200 provides a contact closure between the E and SG leads at the interface to send on off-hook to the connecting equipment and an open between the E and SG leads to send an on-hook

Figure 7-2.Type II E&M Signaling

E&M Ports 7-3