Telecommunications - b - isdn signaling atm adaptation layer - service specific coordination function for support of signaling at the user - to - network interface sscf at the uni 电信. b - isdn信令atm适配层.支持用户与网络接口信令的服务专用协调功能
2.
Nni sscf telecommunications - b - isdn signaling atm adaptation layer - service specific coordination function for support of signaling at the network node interface sscf at the nni 电信. b - isdn信令atm适配层.支持网络节点接口信令发送的业务特定协调功能
