5548| 12
|
谁有国内PSTN网络的结构图(要详细的图) |
|
发表于 2004-2-18 16:19:00
|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, 2024-11-14 12:32 , Processed in 0.109571 second(s), 16 queries , Gzip On.
Copyright © 1999-2023 C114 All Rights Reserved
Discuz Licensed