Transfer of OAM ( Operations, Administration and Maintenance) information for reserved and permanent services may be provided via a D-channel in another interface structure. 用于预留和永久业务的OAM信息的传递可以通过在其他接口结构中的一个D信道传送。
It is only efficient to two-channel, but can't extend to arbitrary D-channel ( D2) completely. 论证了该算法具有一定的局限性,即:只对两通道有效,而不能完全推广到任意的D(D2)通道。
The HDLC Protocol Controller can be used as a D-channel interface in a digital line card comprised of multiple DNICs. HDLC协议控制芯片也可以作为D通道接口,用在包含多个DNIC的数字线路卡上;