2.15.2. IPDA 
For IPDA, the codecs for the master connection are switched by DNIL
and configured in AMO SDAT / AMO TDCSU, etc., i.e. in the user/trunk
data of the affected devices (see IP Distributed Architecture (IPDA),
Section
2.4, “Subscriber, CO/Tie Trunk Circuits in Access Points”).
IMPORTANT:
This means that the codecs do not need to be configured
in the AMOs CGWB and STMIB for the IPDA master connection.
For IPDA connections, the codecs are configured as previously described
in the AMOs STMIB or CGWB (see also Section 11.5,
“TYPE ASC - Setting the Codec List for DMC Connections, RTP Packet Size, Voice Activity Detection and T.38 Fax”,
Section 13.2,
“TYPE ASC - Setting the Codec List for DMC Connections, RTP Packet Size, and Voice Activity Detection”
bzw. Section 11.6,
“TYP ASC - Transmission of DTMF/Fax/Modem Tones”).
IMPORTANT:
The RFCFMOIP, RFCDTMF and REDRFCTN
parameters in the TYP=ASC branch must have the same value in all
IPDA gateways (STMI2/4/STMIX/STMIY with regard to AMO CGWB & NCUI2+/4 with
regard to AMO STMIB). This avoids problems and a common function across
all systems is achieved!