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- HP Community
- Poly Phones
- PSTN
- Configure for PSTN mode

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11-06-2014 12:27 PM
Our soundstation duo lost its firwmare and wouldnt boot. I updated it using tfpt with a .sip.ld file.
Does contain code for both SIP and PSTN mode? When the phone boots it says "server not found" - its connected now to a PSTN line. How do I switch it to PSTN mode or do I need to load with different firmware. I cant figure it out.....
Can someone pls provide a pointer....Thanks
11-07-2014 02:13 AM
Hello Steve1,
welcome to the Polycom Community.
The SoundStation Duo Guide => here <= explains on page 2 how to setup the PSTN mode
In addition please consult the community's VoIP FAQ as this contains various informations regarding the SIP part of the SoundStation Duo.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.
Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN

11-07-2014 05:09 PM
It doesnt actually, " If your phone is set up to operate in PSTN mode, and no initial configuration
has been set, the first time the phone starts, you’ll be prompted to enter certain
information."
My phone is NOT set up to operate in PSTN mode and some initial configuration must already be set!
The question is how do I RECONFIGURE for PSTN mode?
Remember....the phone was bricked...wouldnt boot. Had to load new FW, which I did, and it seems to be in SIP mode looking for a network and I dont want that.
I have read the FAQ, searched the users guides and forums a bit....to no avail.
If you could offer further guidance I would appreciate it. It must be something simple I am missing.....
11-08-2014 08:30 AM
Hello Steve1,
Simply factory reset the phone.
The community's VoIP FAQ contains this post here:
Oct 10, 2011 Question: How can I reset / Factory default my Phones configuration?
Resolution: Please check => here <=
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.
Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN