DS1 lines Broadcast from one location to another

[BlueTights]

I have more questions about our studio.

We ordered at a point to point digital line from our studio, going directly to the radio station. According to our station, we need a Musicam Primalt103 in both locations. As we have recently found out how expensive it is, does anybody know of any other codecs that would work? We currently have a Comrex Dxr.1

 

[RF Man]

I have more questions about our studio.

We ordered at a point to point digital line from our studio, going directly to the radio station. According to our station, we need a Musicam Primalt103 in both locations. As we have recently found out how expensive it is, does anybody know of any other codecs that would work? We currently have a Comrex Dxr.1

Do you know if this DS1 has IP addresses assigned? If it does you might be able to use something like Shoutcast to broadcast and Winamp to receive. This will still cost you money if you don't have the hardware to pull this off. Also Shoutcast may or may not cost you $$$$. The quality will not be as good as a Musicam codec. You should be able to aceive Marti quality if you encode at a high bit rate.

 

[jorr]

Remember, a DS-1 (Point to Point) line is simply 24 time divison multiplexed channels. What you do with it is up to you. I have one client that using a Mosely Starlink T1 STL/TSL (remember the line is bi-directional).

You will have a CSU/DSU (Channel Service Unit/Data Service Unit) after the DS-1 smart jack however, you could also put a router next. Once that is done you could route IP traffic (or whatever protocol you wish). Typically in broadcast you would use UDP as your transmisson protocol as it has lower overhead and in live material if you lose a packet it does not matter (you would not resend and play it out of time). APT makes a great STL. You could also use numerous IP codecs.

From breifly looking at the product you mentioned... Are you sure this line is a DS-1, and not ISDN? That will make somewhat a difference in what you get.

-Jeff

 

[kharnack]

A point to point DS1 should be the same thing as a T1. This is a 1.5 Mbps clocked circuit from your studio to the radio station.

You have several options in terms of getting audio from your studio to/from the radio station. Indeed a codec such as the Prima you mentioned will work fine. I work for Telos, so I'd recommend you have a look at Xstream. At each end of the circuit, you'll need a "CSU/DSU". This box is normally provided by the customer (in North America) and you would get one that had a data interface that's appropriate to your intended connection to your codec.

The most common connection is a high-speed serial data connection called "V.35". Your codec (Telos or otherwise) can be ordered with a V.35 connection (you won't need the ISDN interface that people usually order with codecs). The V.35 connection on the codec connects to the V.35 connection on your CSU/DSU. This happens at both ends. This is a VERY RELIABLE connection; its how many national radio shows are connected to their main studios or how programs are sent to one of the satellite distribution providers like ABC or Westwood One.

The CSU/DSU is commonly available from Adtran. A knowledgeable Telos dealer can help you order the right one. There will be plenty of room left over on your DS1 (T1) circuit, even if you run your codec at a high bit rate, like 256 or 384 kbps. The extra capacity could be used to connect other devices between your studio and the radio station, if you wanted to.

You can get more info on how to do this from the Telos Support Dept at 216 241-7225 or <[email protected]>.


Best regards,

Kirk Harnack
Telos Systems