Page 1165 of 1814International ISDN PRI Feature description and administration1174Japan TTC Common Channel SignalingContentsThe following are the topics in this section:Regional material statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1165Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1165Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1166Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1167Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1169Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1170Task summary list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1170Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1174Regional material statementThe information presented in this section does not pertain to all marketregions. Contact your system supplier or your Nortel Networks representativeto verify support of this product in your area.Feature descriptionThe Japan Telecommunication Technology Committee (JTTC) CommonChannel Signaling is the Japanese version of the International StandardOrganization (ISO) ISDN QSIG. It specifies the Layer 3 protocol signalingrequirement for support of circuit switched call control at the “Q” referencepoint between a Private Integrated Services Digital Network (PISN) and aPrivate Telecommunication Network (PTN).