Update ont-zte-f601.md (#181)

* Update ont-zte-f601.md

- add external script to enable telnet
- add other informations

* Update ont-zte-f601.md

fix typos

* minor fix

* format table

* Update ont-zte-f601.md

* Update ont-zte-f601.md

* Update ont-zte-f601.md

- add parition backup
- add hwver\swver procedure

* Update ont-zte-f601.md

- fix to match ONT template

* fix

* fix url

* update version

* fix table

* Apply suggestions from code review

Co-authored-by: Giovanni Condello <nanomad@users.noreply.github.com>

* Update _ont/ont-zte-f601.md

Co-authored-by: Giovanni Condello <nanomad@users.noreply.github.com>

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Co-authored-by: Simone Bortolin <simonebortolin@users.noreply.github.com>
Co-authored-by: Simone <26844016+simonebortolin@users.noreply.github.com>
Co-authored-by: Giovanni Condello <nanomad@users.noreply.github.com>

Author: 3 people