VoIP Phones - Grandstream HT8xx: Difference between revisions

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* [https://documentation.grandstream.com/knowledge-base/firmware-upgrade-guide/ Grandstream's upgrade guide]

* [https://www.grandstream.com/support/firmware Grandstream's firmware download page]

* [https://www.grandstream.com/hubfs/Product_Documentation/HT8xx_Security_Manual.pdf Grandstream's security guide]

=Obtaining an IP address via handset=

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[[File:HT8XX.png|600px]]

This is based on the author's experience of the HT801 (bought new in Sep 2018), which is a small unit (roughly 4" x 4" x 1") which provides 1 FXS port and no FXO ports. It does IPv6.

This is based on the author's experience of the HT801 (bought new in Sep 2018), which is a small unit (roughly 4" x 4" x 1") which provides 1 FXS port and no FXO ports. It does IPv6 (with later firmwares).

Similar units are the HT802 (which has 2 FXS ports), and the HT81x series (which adds a NAT router, and is available with different

numbers of FXS ports).

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* Unregister on Reboot = Yes

=== no ring, but actually working? ===

If you have an older phone plugged in to the Grandstream, and if calls work, but the phone doesn't actually ring, then you may be needing a RG11 to BT adapter that includes a ring capacitor, such as https://www.broadbandbuyer.com/products/2370-esscable-rjp-bts/

== NAT notes ==

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==IPv6 Only==

I finally bit the bullet and configured the unit for IPv6 only. It needs to know about IPv6 DNS and NTP servers, and would need to use an IPv6 syslog server if that service is required, but it just works. Note that the options for getting its IPv6 address are DHCPv6 or static config - it doesn't seem able to use SLAAC.

I finally bit the bullet and configured the unit for IPv6 only. It needs to know about IPv6 DNS and NTP servers, and would need to use an IPv6 syslog server if that service is required, but it just works. Note that the options for getting its IPv6 address are DHCPv6 or static config - it doesn't seem able to use SLAAC. Update (2025): on more recent firmwares selecting 'dynamically assigned via DHCP' will use SLAAC if there's no DHCPv6 server).

==Firewall & Security==