diff --git a/README.md b/README.md
index f38cd9c..cad819a 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,9 @@ the firmware can be installed on the hardware as given below, how much of the sw
 will actually work as a switch, will vary. On the 
 keepLINK kp-9000-6hx-x (RTL8372 + RTL8221B 2.5GBit PHY: 5 x 2.5GBit + 1x 10GBit SFP+),
 at present the system will provide switching capabilities between the 5 Ethernet ports.
-The ports served by the RTL8372 will be 1G/2.5G auto-detect. Port 5 connected via the
-RTL8221B, will only work in 2.5GBit mode. All configuration must be done via serial
+The ports served by the RTL8372 will be 100M/1G/2.5G auto-detect. Port 5 to RTL8221B PHY
+SerDes configuration works and supports 1GBit and 2.5GBit Ethernet (SGMII/HISGMII). 
+All configuration must be done via serial
 connection (there is no web-interface), so soldering skills are required. Flashing
 must be done via a SOIC-8 PatchClamp or by soldering a socket for the flash chip.
 The SFP+ port does not work. There is no access to the CPU-port (NIC).