a3ComPathDialRateAdaption 1.3.6.1.4.1.43.2.18.2.1.13

Specifies the data rate to be used on the ISDN B channel. Rate64 and Rate56 specify that the channel be connected at 64K or 56K, respectively. The connection attempt would fail if the ISDN network does not support this. If Auto is specified, an outgoing call is first attempted at 64K and, if that should fail, the call is retried at 56K. On an incoming call, the call is automatically adapted to the correct rate. The path has to be enabled for the new setting to take effect.