On the distributed versions of CA XCOM Data Transport you would specify SSL_METHOD to TLS in CONFIGSSL.CNF for to disable SSLv3 as follows:
# Mandatory, note that CA-XCOM supports v3, tlsv1, tlsv1.1, tlsv1.2.
# default "all"
INITIATE_SIDE = tls
RECEIVE_SIDE = tls
The actual SSL and TLS protocols are further tuned through options. By using SSL_OPTION (and removing the unwanted protocol versions with SSL_OP_NO_SSLv2 and SSL_OP_NO_SSLv3), then you will effectively use TLS v1.0 and above, including TLS v1.2. You can also use SSL_OP_NO_TLSv1 and SSL_OP_NO_TLSv1_1 if you want to use the TLS 1.2 protocol only.
SSLv3 can be used only with FIPS_MODE=NO in XCOM.GLB. It uses the same cipher suites as TLSv1 with FIPS_MODE=NO.