The only Siemens Qsig Protocol, which is interoperable with the SmartNode products is ISO-QSIG.
You must choose as QSIG version ISO-QSIG.
All other Siemens Qsig versions show restrictions in the supported supplementary services, such as the caller name.
On all ISDN SmartNodes SN4xxx, the following QSIG standard is supported.
"ECMA-143" ISO/IEC 11572, ETSI EN 300 172