Tandberg Gateway/ Pri inquiry?

[varcos]

Hey fellas,

I had a small inquiry and I am kinda stumpped on where to go abouts looking for the answer to it. Perhaps someone here can help?

A client of mine has a Tandberg Gateway which he uses to dial out to ISDN clients around the world. Currently he has 4 lines active on a PRI that he uses for his calls (so at any given time, he can place only 1 512 ISDN call). So, he has 8 PSTN numbers assigned to those active lines.

Now where I get lost is that he has other ISDN lines across the country at various locations that he does not use anymore and wants to get rid of those and add more lines to his Tandberg Gateway.

Would he simply have to tell the telco to enable/assign more numbers to that PRI and possibly get a bigger CSU in his building to handle the more lines? Or perhaps a better question would be does he necessarily need to get more lines installed from his telco to enable the larger PRI throughput to his gateway.

Any help on this would be great guys. Thanks a bunch!



D. :banana:

[MDTV]

I'm assuming by "lines" you mean channels? If so, 4 active channels would limit him to one 256k call. 8 channels would be required for a 512k call.

A full PRI has 24 total channels - 64k each. One of those channels is a D-channel, so you effectively would have 23 available B-channels (bearer channels) to work with. In your friend's case, it sounds like he has a device (CSU?) appropriating only a portion of a full PRI to the gateway. The first answer would be to allocate more of that PRI's resources (channels) to the unit to increase capacity. If 23 channels aren't enough, more PRI's can be added to the machine (4 total for the Tandberg gateway I think.)

The issue of numbers (DID numbers) is independent of capacity. You can have as many dial-in numbers as you wish for a PRI (aquired from your provider) - they are not associated with particular channels, as with a BRI. More DID numbers does not equal more capacity.