Applicable Product: Nyquist E7000, and Nyquist C4000 Applicable Release: Nyquist E7000 8.0.0:1050 and Nyquist C4000 5.0.0:740 Fixed in Release: Nyquist E7000 9.0.0, Nyquist C4000 6.0.0 with Firmware NyqUpdate-4.3.4.tar.gz or higher Firmware File Name: NyqUpdate-3.7.2.tar.gz How to apply updated firmware: Use "Firmware" view of the Nyquist web interface. This new Nyquist appliance firmware version (NyqUpdate-3.7.2.tar.gz) provides the following fixes: [NYQ-7146] Fixed a red flashing digital call switch issue where it is connected to the NQ-S1810CT-G2 and NQ-S1810WT-G2.