Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)




"You have an excellent product !!!!!!" - Comment from Arely
"I had always used ******* but for the past 2 weeks have been trying DTN IQFeed. Customer support has been extraordinary. They call just to make sure your problem hasn't recurred." - Comment from Public Forum
"And by the way, have to say this. I love the IQFeed software. It's rock solid and it has a really nice API." - Comment from Thomas via RT Chat
"Previously I was using *******. IQFeed is WAY more economical, and for my charting needs is just as good, if not better." - Comment from Public Forum Post
"I've been using Neoticker RT with IQFeed for two months, and I'm very happy with both of the products (I've had IQFeed for two years with very few complaints). The service from both companies is exceptional." - Comment from Public Forum
"Thanks for the great product and support. During this week of high volume trading, my QuoteTracker + IQ Feed setup never missed a beat. Also, thanks for your swiftness in responding to data issues. I was on ******* for a few years before I made the switch over early this year, and wish I had done it a long time ago." - Comment from Ken
"I've never had DTN go out on me since switching. ******* would go down a couple times every month when I was using them." - Comment from Bryce in AL.
"I noticed that ******* quotes locked up shortly after the interest rate announcement yesterday while yours stayed stable." - Comment from Ron in Utah
"Thank God for your Data Feed as the only Zippers I see are on my pants (LOL), and no more 200 pip spikes to mess up charts." - Comment from Spiro via Email
"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post
Home  Search  Register  Login  Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather
Follow DTNMarkets on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
»Forums Index »Archive (2017 and earlier) »DTN Satellite Products »What is the total bandwidth of DTN RT satellite link??
Author Topic: What is the total bandwidth of DTN RT satellite link?? (5 messages, Page 1 of 1)

chrisk
-Interested User-
Posts: 6
Joined: Sep 17, 2005


Posted: Sep 17, 2005 10:10 AM          Msg. 1 of 5
Does anybody know what is the total bandwidth (in bits/sec) of the DTN satellite link for
transmitting all trading data, e.g. trades/quotes for all equities, options, futures, indexes, forex, etc?? That is all trading data less anything like weather info not directly related to trading.

chrisk
-Interested User-
Posts: 6
Joined: Sep 17, 2005


Posted: Sep 17, 2005 10:14 AM          Msg. 2 of 5
Just to clarify, I meant to say the maximum bandwidth and not what is actually transmitted which may depend on a given day or given instance.

David
-DTN Evangelist-
Posts: 113
Joined: May 7, 2004

I'd rather be...


Posted: Sep 17, 2005 12:13 PM          Msg. 3 of 5
FWIW: The DTN receiver has an Ethernet, USB and serial connection - I run the serial connection at 460kb to get the information for a full subscription running in a 'send all' mode. The elimination of the stock options has freed up some bandwidth. I do not know the actual BW or peak rates but I do know if run less than 460kb on the serial link there is packet loss.(1) The bad part is you do not know this is happening because if the queue is full they get discarded receiver side - this shows particularly in getting the morning opens on stocks in the morning. For serial com you need to have a UART with a large buffer (128) to handle the rate so that the UART doesn't overflow. I have not played with USB or the Ethernet but I suspect Ethernet tcp/ip is the way to go especially for a Windows program. For it the connection BW will not be an issue, only the quickness of processing client side.

(1) note: based on empirical observation.

David

IQXP Software
http://www.iqxp.com

LiveWire Update Service
PO Box 1417
Fairfield, IA 52556
641-472-8393
http://www.livewire-cablesoft.com/

chrisk
-Interested User-
Posts: 6
Joined: Sep 17, 2005


Posted: Sep 17, 2005 12:27 PM          Msg. 4 of 5
Your 460kb (I assume Kbits/sec) is the speed you saw on your connection between DTN Receiver and your PC. I was asking about the satellite link (between DTN Transmitter in Nebraska to a satellite and down to your DTN Receiver) where DTN uses totally different format using compressing (the data on your serial link is decompressed and in different format). Secondly, DTN sends *ALL* its DTN RT trading data through its satellite link, and your serial link had only the data you subscribed to. Also, I asked about the maximum capacity of the link and not what you could see at any particular moment.

DTN_Jay_Froscheiser
-VP, Product Operations-
Posts: 1746
Joined: May 3, 2004

DTN IQFeed/DTN.IQ/DTN NxCore


Posted: Sep 18, 2005 08:13 PM          Msg. 5 of 5
Chris, I don't have the exact numbers with me, but it is close the 1mb. This number is somewhat deceptive and I can't really give you a true "only data" bandwidth number however. DTN transmits data over multiple satellite channels which each have a set amount of bandwidth and certain data sets. We then prioritize data on each channel with "virtual channels". Quote data gets the highest priority, so in reality, it could use 100% of the available bandwidth if needed. Hopefully this is what you were looking for.

Jay Froscheiser
DTN - Trading Markets
 

 

Time: Sun February 25, 2024 6:07 PM CFBB v1.2.0 9 ms.
© AderSoftware 2002-2003