4499| 17
|
[Sonet/SDH] 在用户的大楼里,主要是SDH设备多还是PDH设备多 |
|
发表于 2004-5-4 11:29:00
|显示全部楼层
| |
手机版|C114 ( 沪ICP备12002291号-1 )|联系大家 |网站地图
GMT+8, 2024-11-5 17:32 , Processed in 0.089882 second(s), 16 queries , Gzip On.
Copyright © 1999-2023 C114 All Rights Reserved
Discuz Licensed