[Openbts-discuss] No. of concurrent calls in Openbts

[Grace S. <ggs...@gm...>]

I plan to maximize the number of concurrent calls in OpenBTS. Since OpenBTS
used only 1 channel, the maximum concurrent calls must be 7 ( 7  TCH + 1
Signal Channel) . But when I tested my openBTS, it has only 3 concurrent
calls. These are my OpenBTS.config settings:

GSM.NumC7s 0
GSM.NumC1s 7

And my load in Openbts command prompt:

SDCCH load: 0/4
TCH/F load: 6/7
AGCH/PCH load: 0,0
Paging Table size: 0
Transaction/TMSIs: 7,13
T3122: 2000ms

I am using the OpenBTS version from git with hardware USRP 1 and 2 RFX1800.

>From what I understand, 1 traffic channel is used for every phone call. But
in my testing, I notice that when I make 1 phone call, the TCH/F load is
2/7. So each phone is using one channel. Is there a way to maximize the 7
channels for 7 concurrent calls? and Are there some limitations from
hardwares used? Thanks!

Gracie ^__^