We are busy upgrading from AES 6.3 to AES 8.0.1. The client has
a Nice Recorder 6.6 using passive voip recording. The Nice Recorder is currently
using the Tsapi 6.1 client to communicate with e AES 6.3. Will the current Tsapi 6.1
client also work correctly with the new AES 8.0.1?

As per Administration guide: pg.no:83, AES 8.0.x, it says it does: could you please confirm

In the Security field, select one of the following:
• Unencrypted: To use unencrypted client connections.
• Encrypted: To encrypt client connections for this TSAPI link.
• Both: To use both encrypted and unencrypted client connections.
If you select the Both option, all TSAPI clients using the Encrypted Advertised TLINK
require AE Services 4.1 or later.
Any TSAPI clients using the Unencrypted

Yes, an application developed with TSAPI 6.x SDK will work with AE Services 8.x.

Martin