8.8.11 GA Release|| Zimbra Collaboration 8.8.11 Patch-3 has been issued on 4 March 2019. Please refer to the release notes for Zimbra 8.8.11 Patch-3 installation on Redhat and Ubuntu platforms. With 8.8.11 Patches, customers do not need to download any Zimbra Collaboration Patch builds. Patch packages can be installed by using Linux package management commands.

The USB COM232 Plus 4 module is a single USB interface to four independent RS232 ports, communication unit. The integrated electronics of the USB-COM232-PLUS4 utilise the FTDI FT4232H (USB 2.0 Hi-Speed unit) and includes RS232 level shifters plus Power/TXD/RXD LEDs to provide a visual indication of data traffic through the module.The module uses a standard USB-mini B unit connector for connection to an upstream host or hub port.

RS232-level signals, including modem handshake signals, are available on an industry-standard DE-9P connector. There is a separate DB9-PE for each RS232 port.The module is powered from the host USB port and therefore does not require an external power supply.All modem control lines are provided - TXD, RXD, RTS, CTS, DCD, DTR and DSD.Pin 9 of the DE-9P connectors is a RI# pin for remotely waking up a sleeping host.The maximum RS232-level data rate for each channel is 1Mbps.The product works with the royalty free FTDI drivers for Windows, MAC, Linux.The USB-COM232-PLUS4 is fully RoHS compliant and is CE and FCC approved.Operating temperature range -40oC to +85oC.

Jesus Echavarria @ jechavarria.com has build a 4 in 1 USB Serial converter based on MCP2221A. This board is mainly a USB hub with 4 USB to serial converters. Is like the typical USB to TTL adapter but with one USB port you get up to 4 serial ports. USB to serial drivers for most serial RS232 devices. Download drivers for most types of USB to serial adapters and converters. Home:: Downloads Downloads.