SDK/API

Posts: 1424 · Posted: Wed Oct 11, 2006 9:49 pm Post subject:

Why not start a new thread? We have covered this quite often so a search might be appropriate.

The are two ways to detect an incoming call. You can hook a standard modem to the analog output of the Vonage adapter or you can sniff packets in front of your Vonage adapter and watch for a SIP invite.

Are you using a TTY device (or maybe software) with Vonage? How well does it work?

Posts: 142 · Posted: Wed Oct 11, 2006 11:08 pm Post subject:

Oh okay. I just thought I might want to bring up a thread here since it's about API/SDK.

About my TTY, it worked pretty well. Despite unable to dial 711 from my TTY, I had to go to a Florida Relay Service website and get the TTY phone number. So I get to my TTY and dialed the number. The relay operator who answered my call mentioned something like this "FL OPR RLY IDxxxxxx GA" (where "IDxxxxxx" is a relay operator's ID number and "GA" stands for "Go Ahead."). So, I entered. Now, instead of mention the real phone number, I'd give it an example of "85001201234" so I type "85001201234 ga" in my TTY and I get "Dialing 850-012-01234 Pls Hd" as a confirmation that I dialed the number. Again, this is just an example so I didn't do that in my TTY and that's not intentional. So far, me and the caller gets "ungarbled" text with no problem.

About having a modem, I don't have a wireless phone jack system ($40 to purchase and I don't think it's worth spending it for me because I plan to live in an apartment by my own soon and start college) and the cable modem are located in the living room while I'm in a bedroom, so since I live in a 2-story apartment, the family's computer with the cable modem are downstairs and my laptop that I own is upstairs, so it looks to me my only choice is wireless phone jack system.

The TTY machine that I'm using is Ameriphone Q90=D TTY.

As for watching for an SIP invite, I'm not sure how I'd do that but since even though I have knowledge of VT2142's IP address, I'm not sure what ports does SIP Invite use.

By the way, my programming knowledge is C# so it may be a bit similar to Java.

Posts: 1424 · Posted: Thu Oct 12, 2006 7:56 am Post subject:

Still not 100% on your situation;

Cable modem, desktop computer, wireless access point and Vonage adapter are downstairs. Laptop computer and TTY are upstairs.

How is the TTY connected to Vonage? What is your network configuration? What Vonage equipment are you using?

If the downstairs computer is left on and has a modem it could be connected to the Vonage phone line to detect ringing and it could send a message to the laptop over your wireless network.

If you put a hub (it has to be a hub, not a switch) between your cable modem and your Vonage equipment you can connect a computer to that hub and sniff the packets going to the Vonage equipment. A SIP invite packet is very easy to recognize, but before you go to that trouble use a program like ethereal to make sure you can actually see the traffic. If you do this you will be able to see exactly what the SIP invite packet looks like. Again you will probably have to do this from your desktop computer and then send a message to your laptop if that's where you need the notification. There is already a caller id over Internet protocol (YAC) that you can use from one computer to another, there are also several free client programs you could run.

Note: There is already software written to do everything above.

Posts: 142 · Posted: Thu Oct 12, 2006 9:00 am Post subject:

No, TTY's downstairs, connected to VT2142, along with DI-524, because there's only one cable jack downstairs in the living room where the modem connects to. Sorry I forgot to mention that about my TTY.

A hub is extra equipment (and can be a mess!), but thanks anyway. I won't be living in a family apartment soon, so my laptop is all I have.

Posts: 1424 · Posted: Thu Oct 12, 2006 10:43 am Post subject:

Does the desktop have a modem? Does the desktop stay on? Is the desktop near the TTY and VT2142?

Posts: 142 · Posted: Thu Oct 12, 2006 11:40 am Post subject:

My family's desktop is always on and my TTY is near the desktop and VT2142. Plus, the computer has a modem.

Posts: 1424 · Posted: Thu Oct 12, 2006 1:27 pm Post subject:

Use a splitter on the output of the VT2142, connect the phone cable to the computer modem.

You can use the YAC software http://sunflowerhead.com/software/yac/ to monitor the modem for incoming calls. You can then use a yac listener on your laptop. The source code is available so you can write a YAC listener application to do anything you want.

Posts: 142 · Posted: Thu Oct 12, 2006 10:24 pm Post subject:

Ok. I've downloaded YAC for both of the computers and since I have my family computer run YAC Server and my laptop as YAC Listener, I fount that it worked for me.

I'll be downloading a packet sniffer to see what SIP Invite packet looks like and will be developing my program by my own. Thanks!

Posts: 1424 · Posted: Fri Oct 13, 2006 8:21 am Post subject:

You won't be able to sniff packets from Vonage unless you place a hub between your cable modem and your Vonage device, or depending on your laptop's capabilities, connect your VT2142 to your laptop and route traffic to the Internet over your wireless network via internet connection sharing.

Posts: 142 · Posted: Fri Oct 13, 2006 11:39 am Post subject:

OK like I said I used YAC since I've connected my TTY's phone jack to my computer and listen for caller ID info from the modem. I'm able to sniff packets from YAC and can be able to develop my own application for detecting a packet and letting me know that I have a TTY call.

Thanks for all your help.