Three Visits to Get a Seven-Room Share House Stable: Telstra 100M on DSL, and Two Mesh Kits That Did Not Survive It

三次上门才把一栋七房合租屋弄稳：Telstra 100兆走DSL，两套Mesh先后阵亡

Share house · near UNSW合租屋 · UNSW附近Telstra 100MTelstra 100兆DSL phone lineDSL电话线接入2 storeys · 7 rooms两层 · 7个房间3 on-site visits上门3次Mesh → separate SSIDs从组网改为分开WiFi名

When the student first got in touch I assumed this was a straightforward dead router. It turned out to be a two-storey, seven-bedroom share house on a DSL line where two different mesh kits both failed in different ways, and where the thing that finally made it stable was giving up on a single shared network name.

这位同学找过来的时候，我一开始以为只是简单的路由器坏了。结果是一栋两层、七个房间的合租屋，走DSL电话线，两套不同的Mesh设备各自以不同的方式失败，而最后让它真正稳下来的，反倒是放弃了统一的那个WiFi名称。

What the house looked like

这栋房子的情况

A house near UNSW, two storeys, seven bedrooms shared between housemates.
Provider: Telstra. Plan: 100 Mbps. Connection: DSL phone line.
Original setup: a Telstra router as the main unit upstairs, with a Telstra Smart WiFi Booster downstairs meshed to it, both broadcasting the same network details.
Handled as three separate on-site visits.

房子在悉尼UNSW学校附近，两层，共有7个房间，室友合租。
运营商：Telstra。套餐：100兆。接入方式：DSL电话线。
原始配置：楼上一台Telstra路由器作为主路由，楼下一台Telstra旗下的Telstra Smart WiFi Booster与之组网，两者共用相同的WiFi信息。
处理方式：线下先后上了三次门。

A DSL house, and where a fault can hideDSL入户的房子，故障可能藏在哪

Telstra DSL lineTelstra DSL电话线

100M plan / 100兆套餐

→

Main router (dial-up)主路由（拨号）

upstairs / 楼上

→

Second unit第二台设备

downstairs / 楼下

Bottleneck瓶颈

→

7 bedrooms7个房间

2 floors / 上下两层

The awkward part of this job is that two routers which had both tested fine on a WAN-port connection misbehaved on this DSL service. A router that works on one connection type is not automatically fine on another, and in a seven-room share house the symptom reaches everybody at once.这单最难受的地方在于：两台之前用WAN口接网测试都正常的路由器，换到这条DSL线路上就出问题。一台路由器在某种联网方式下正常，不等于换一种联网方式也正常，而在七个房间的合租屋里，故障是所有人同时遇到。

Three visits

三次上门

Three visits, and what each one ruled out三次上门，每一次排除了什么

Visit 1 · test the original Telstra router第1次上门 · 测试原Telstra路由器

No signal passing through无信号传输

Visit 1 · fit replacement router A第1次上门 · 换上替换路由器A

Online, but will not mesh with the Telstra booster能上网，但无法与Telstra的booster组网

Same night · housemates report brief dropouts当晚 · 室友反馈短暂断网

All rooms affected所有室友都遇到

Visit 2 · fit a Netgear mesh pair第2次上门 · 换上一套Netgear组网设备

Both units paired, one network name主副配对成功，共用一个WiFi名

30 minutes later · WiFi but no internet半小时后 · 有WiFi没有网络

Main router's internet light still normal主路由联网指示灯却仍正常

Visit 3 · TP-Link main + Netgear extender第3次上门 · 换TP-Link做主路由，Netgear做扩展

Separate SSIDs, deliberately刻意把两个WiFi名分开

Half a day later · follow-up with the household隔了大半天 · 回访该同学与室友

No further dropouts, both floors covered未再断网，上下层均有覆盖

Attempt by attempt

逐次对比

The three attempts side by side三次尝试逐一对比

	Attempt 1第1次	Attempt 2第2次	Attempt 3第3次
Main router主路由	Replacement router A替换路由器A	Netgear mesh mainNetgear组网主路由	TP-LinkTP-Link
Second unit第二台设备	Original Telstra Smart WiFi Booster原Telstra Smart WiFi Booster	Netgear mesh nodeNetgear组网节点	Netgear as extenderNetgear改作扩展器
Network namesWiFi名称	Meant to be shared本应共用一个	Shared共用一个	Deliberately separate刻意分开
What went wrong结果如何	The two brands would not mesh at all两个品牌根本无法组网	WiFi present, internet gone within 30 min有WiFi，半小时内没有网络	Stable on follow-up, both floors covered回访稳定，上下层均有覆盖

The third setup deliberately gave up something the household wanted, and that is the part worth explaining.

A single shared network name across both floors is genuinely nicer to live with — devices roam without being told to.
But when a fault keeps returning and you cannot tell which unit a device was actually on, one shared name hides the evidence.
Splitting the main router and the extender onto separate names made it possible to see where a problem was occurring if it came back.
It did not come back. On follow-up half a day later, the student and the housemates reported normal use with coverage on both floors.

第三套方案其实主动放弃了住户想要的一个功能，这一点值得解释清楚。

上下楼共用一个WiFi名称，日常体验确实更好，设备不用手动切换。
但当故障反复出现、而你又分不清某台设备当时连的是哪一台设备时，共用一个名称等于把证据也藏起来了。
把主路由和扩展器的WiFi名称分开，是为了方便排查定位——万一再出问题，能看出是哪一边。
结果它没有再出问题。隔了大半天回访，该同学和室友反馈使用正常，楼上楼下均有WiFi覆盖。

What I took away from it

这单给我的经验

Different routers can behave differently on different connection types. Both of the units I brought are not cheap devices and both had tested fine on a WAN-port connection; on this DSL service they did not hold.
Mixing mesh hardware across brands generally does not work. A Telstra booster will not pair with a third-party router, and that alone can turn a simple router swap into a coverage problem.
In a share house, verify with the household over the following day rather than at the moment you pack up. Both of the first two setups tested fine on the spot.

不同路由器在不同联网方式下，可能有不同的表现。我带上门的这两款路由器本身都不便宜，之前用WAN口接网测试都正常，这次走DSL就出现断网。
跨品牌混用组网设备基本行不通。Telstra的booster不会和第三方路由器配对，光这一点就能把一次简单的换路由器变成覆盖问题。
在合租屋里，要在第二天回访住户，而不是收工那一刻就下结论。前两套方案在现场测试的时候都是正常的。

Result最终结果

Root cause: the original Telstra router had stopped passing signal, and the follow-on faults came from hardware combinations that did not suit this DSL service — a replacement router that could not mesh with the Telstra booster, then a Netgear mesh pair that produced WiFi with no internet within half an hour while the main unit's internet light stayed normal. The setup that held was a TP-Link main router with the Netgear unit as an extender on deliberately separate network names. On follow-up half a day later the household reported no further dropouts, with coverage upstairs and down.

根因是原Telstra路由器已经不再传输信号，而后续的故障来自与这条DSL线路不匹配的设备组合——先是替换路由器无法与Telstra的booster组网，再是一套Netgear组网设备在半小时内出现有WiFi没网络、而主路由联网灯却仍正常的情况。最终稳定下来的方案是TP-Link做主路由、Netgear改作扩展器，并刻意把两个WiFi名称分开。隔了大半天回访，室友反馈不再断网，楼上楼下均有覆盖。