Cisco SPA2102 VoIP Phone Adapter with Router Review

Average Reviews:

(More customer reviews)This adapter is excellent for those tech-savvy enough to configure.
Echo cancellation and jitter buffer work well.
The latest firmware allows you to increase the DTMF detection timing so that talkoff (spurious DTMF) can pretty much be eliminated. Currently, this can't be done using a PAP2T-NA adapter. This setting is under "Admin -> Voice -> Advanced -> Line1/Line2 -> DTMF Tx Strict Hold Off Time".
If your VOIP provider supports it, then T38 faxing works fairly well, with adjustable redundancy levels.
I've tried many other adapters and always had trouble, this is the only one I'll buy from now on. Anyone interested in a used PAP2T? :)

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Cisco PAP2T Internet Phone Adapter with 2 Ports for Voice-over-IP Review

Average Reviews:

(More customer reviews)You need to know what you're doing to really get the most out of this device, but really, this device works fine. I own several of them and use them for my business and home.
To get it to work, you need to sign up for a SIP account with a VOIP provider, like Voip.ms, Voicepulse, Vitelity, or Callcentric.
I suggest updating the firmware as soon as you receive it, as there are frequent useful firmware updates.To respond to some of the one star reviews:
Of course the device doesn't work with Vonage, it's not supposed to! Vonage doesn't use SIP!
Of course the device died when you plugged the wrong power adapter into it - it fried the circuit board. You could make that same comment about hundreds of devices.
UPDATE: While I still think this device is good, I now recommend purchasing a Linksys SPA-2102 instead, due to a new firmware update from Linksys. It's worth the extra $[...] or $[...] bucks for the ability to tweak DTMF detection.

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Cisco SPA3102 Voice Gateway with Router Review

Average Reviews:

(More customer reviews)The SPA3102 gives you both an FXS port (for a phone) and an FXO port (for a phone line), it's two devices in one box. Each device can operate independently or can be made to interact with the other. It's great for a start-up VoIP system where you want to have one phone and access to one phone line from the PSTN. Be aware that this is NOT a device that is made for plug and play. You have to know what you are doing. It is an extremely flexible device with MANY options. Which means it can be overwhelming to a beginner. A lot of the options can be left at default but you still need a basic (at least) understanding of networking, SIP and VoIP to get this working with a provider or VoIP PBX. If you know what you are doing, this unit can be up and running in 10 minutes, otherwise you'd better have a lot of patience.
This unit is the successor to the SPA3000, first released by Sipura, which was bought by Linksys, then Cisco. they added a few more features upgraded firmware AND a router. Most people will already have a router on their system and will probably just disable this feature and use the second Ethernet jack in bridge mode allowing a second device to be plugged in, saving a port on your router or switch.
All in all a great unit, but not made for the inexperienced, do some research if you aren't quite sure if this is for you, there is a lot of info on line

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