Abstract
Important bug fix for BRI-HFC driver. All users of version 5.5.x are invited to update to 5.5.4.
The most important inclusion in 5.5.4 is a bug fix for BRI-HFC cards that patches a bug present in the HFC chip. This bug was rather serious but very seldom and therefore very difficult to locate and fix. The effect of this bug was the deadlock of D and B channel HDLC frame on the affected channel.
Although seldom, it was serious, and that's why we encourage all users to update to 5.5.4.
Refer to Abilis CPX 5.5.4 release note for further information.