VOFR? Voice Over Frame Relay?

帧中继语音传送?。

Frame Relay Bearer Service?

帧中继运载服务FRBS ？

Frame Relay Switch Node?

帧中继转换节点FRSN ？

Frame Relay Services?

帧中继业务FRS ？

Frame Relay Congestion Management Scheme?

帧中继拥塞管理方案FRCMS ？