how to connect voip phone to ATT nighthawk LTE

[lguo2013]

I recently got a ATT nighthawk mobile hotspot and have an avaya 9600 voip phone at home. I was wondering if there is a way to connect the hotspot to the voip phone, I tried connecting the ethernet cable but it doesn't work 

[JasonN]

Hi Iguo2013,

Can you please identify what model the ATT nighthawk mobile hotspot? Thank you

- Jason N

[lguo2013]

The model is the mr1100 from att

[JSchnee21]

Hi @lguo2013,

Many have reported previously that the Ethernet port goes to sleep if it does not detect a link on hotspot boot up.  In the most recent version of AT&T/MR1100 firmware (from 28-Feb-2018) there is a power save setting for the Ethernet port.  The default is 2min but you can change it to disable.  NOTE you have to use Chrome as the control doesn't seem to work with Safari (on my iPhone at least).  

Also note, some have reported that the MDI/MDIX function doesn't seem to work right on the MR1100.  Anditionally the hotspot might not like being connected to a POE switch.  So you may need to:

1) turn off hotspot

2) cable it to a dumb, non-POE layer2 switch (like the Netgear GS105 or FS105)

3) cable you VOIP phone to the same switch

4) ensure you VOIP phone is set for DHCP

5) Power on the hotspot and verify you have link lights from the Hotspot to the switch and the VOIP phone to the switch.

6) Wait for the hotspot to boot fully.  Then Reboot the phone so that it leases a new IP from the hotspot.

I assume your VOIP phone is with some internet service provider?

-Jonathan