docs(telnet): document Docker fallback when telnet is not installed

Users on systems without a local telnet binary (modern macOS, Windows
without OptionalFeatures, minimal Linux distros) need a workable
recipe to reach the speaker's port-17000 shell. Add a one-line docker
run snippet that uses busybox-extras telnet inside an alpine
container, parameterised by the target speaker IP.

Placed at the top of the reference page so a reader who lands there
asking "how do I run telnet?" sees the fallback before the command
listings.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Tobias Gesellchen
2026-05-14 22:15:53 +02:00
co-authored by Claude Opus 4.7
parent 0556492fe4
commit a8d499cfe9
@@ -12,6 +12,12 @@ recovery / WiFi setup.
> some commands listed here have been removed on firmware 27.x. Where a
> command's availability is known to vary, the **Availability** column says so.
### Telnet via Docker (when not installed locally)
```shell
docker run --rm --name telnet -it --env IP=192.168.123.123 alpine:edge ash -c 'apk add -U busybox-extras && telnet $IP 17000'
```
## Sources
| # | Source | Era / focus |