"NO CARRIER" problem


#1

Hi,

I have 22 calling modems and 500 waiting for calls. (wavecom fastrack supreme)
When I start one call (or two) everything is OK, it connects without a problem

But when i start 7 or 8 calls in the same time, most of calls respond “NO CARRIER”. GSM company says that the signal is strong enough.
After “NO CARRIER” reply, “AT+CEER” command replies error number 47(sometimes 127).

What do You offer?

Thanks in advance.


#2

Have you checked - eg, with AT+CSQ :question:

have you looked-up the meanings of error numbers 47 and 127 :question:


#3

Yes I have checked “AT+CSQ” command before, it gives me “28, 0”.

error 47 is “Resources unavailable, unspecified”
error 127 is “Interworking, unspecified”


#4

The ADL User Guide tells you that these are, “Failure Cause from 3GPP TS 24.008 recommendation (+CEER)”

You can find all the 3GPP Specifications (ie, the GSM specs) here:

3gpp.org/Specification-Numbering

You can download the specs for free - including TS 24.008

See TS 24.008 for further details of the cause codes…


#5

Sorry but i did not figured out what should i do with specification


#6

ie, you read it to get a more detailed description of what the codes actually mean!