Re: [Openbts-discuss] Two voice calls only

[Jonathan W. <jon...@di...>]

 

Hello all, 

I've seen this several places, but I'm confused as to why. 

Whether the MS is calling the 'outside world' or another MS in the same
BTS, it would seem to me that each MS would only need a single audio
uplink, and a single audio downlink. 

However, in a in-BTS call, both MS _do_ need their own channels, i.e. 2
up & downlink channels per call (but not per MS) 

Therefore, if I am not mistaken, 7/2 = 3 simultaneous 2-party calls,
plus an extra 'outside world' call should be possible. 

On the other hand, if 2 channels are assigned to GPRS (I'm not sure if
this is dynamic or not), there would be only 5/2 = 2 simultaneous
2-party calls (plus an extra 'outside world' call). 

This thread seems to agree with the "one channel per party":
http://sourceforge.net/p/openbts/mailman/message/28032412/
It also hints a a solution for doubling the call capacity, with
half-rate channels (basically splitting each channel in two), which
might not have been implemented at the time, and might not yet be
either.

Best regards,
---
Jonathan W

Le 2015-02-05 02:25, Kurtis Heimerl a écrit : 

> One BTS channel can handle 7 concurrent calls, but a call in-network counts as two (one incoming and one outgoing). So yes, you've hit the limit. 
> 
> On Tue, Feb 3, 2015 at 9:28 AM, Yile Ku <sti...@gm...> wrote:
> 
>> I have OpenBTS 4.0 up and running. I have six multimodems connected to the OpenBTS software. I am only able to make two simultaneous calls. When I try to connect the third call it fails. Is there a limit on the number of total simultaneous calls?
>> 
>> Thanks
>> Y- 
>> 
>> [snip]