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- 03-04-2009, 07:51 PM #1Philippe LAMOURGuest
HI to all
I am facing o problem with ZAIN (formerly Celtel) in Gabon.
Having installed a GSM gateway on our PABX, it is impossible to make
incoming call, because the DTMF tones aren't passed to the PABX from the
If I insert a SIM card from a different operator in the gateway,
everything becomes OK.
Is there a parameter in the network subscriber's database that can
restrict transmission of DTMF tones?
The infrastructure is Ericsson.
› See More: DTMF transparency