Install options
All internal option installations entail opening the device case and performing some disassembly.
Because this process requires disconnecting internal components, Welch Allyn requires that the
device undergo a full functional test after reassembly and before placing the device back in service.
Before installing a new option, read information about removing the option in “Disassembly and
repair.” After familiarizing yourself with the process, follow the instructions in the disassembly
section.
Upgrading software with the Welch Allyn Service Tool
The Connex Spot Monitor and the Welch Allyn Service Tool (WAST) interact through Ethernet over
USB technology, enabling the monitor to function as a USB device with both a network and an IP
address. This connection separates logically into two distinct interfaces: a generic USB serial
connection and a Remote Network Driver Interface Specification (RNDIS) network interface, which
is a Microsoft Windows driver. Most interactions between the WAST and the Connex Spot Monitor
take place over the generic USB serial connection. In contrast, software upgrades require the RNDIS
interface for the device to connect the WAST and download the firmware.
During software upgrade, the Ethernet over USB interface with the WAST is auto-configured with
the specifications noted in the table below. When the Connex Spot Monitor reaches out to the
WAST for the firmware package, it uses TCP port XXXX. Be prepared to modify any firewall(s) that
prevent incoming connections to allow this traffic. The WAST attempts to configure the Windows
firewall by opening this specific port on the RNDIS interface. If administrative controls such as a
Group Policy Object (GPO) or third-party software have been implemented to prevent this change,
the WAST attempts to diagnose the problem and then inform you of possible remediation steps.
Work with your IT staff or Network Administrator as needed to enable this functionality.
Interface specifications IP address Network mask
Device Ethernet over USB interface 169.254.10.10 255.255.255.255
WAST RNDIS interface 169.254.10.1 255.255.255.255
At the start of a software upgrade, the Welch Allyn Service Tool creates a local HTTP server and uses
the USB connection to transfer necessary file package to the Connex Spot Monitor. Once the file
package is on the device, it launches the installation of host controller firmware and reboots the
device immediately following the installation. When the device auto-reboots, the software upgrade
of individual modules and sensors (NIBP, SpO2, and/or Temperature) is complete.
Software rollback capability
The Connex Spot Monitor utilizes a primary and secondary software structure. In the final step of
the software upgrade, the device rolls the previous firmware package to a secondary image and
identifies the newly installed firmware as its primary image. This structure allows rollback to
previous versions as needed. For example, if you performed a software upgrade and then
determined that it didn't meet your expectations or conform to your workflow, you can execute a
software rollback in seconds and limit device downtime. To roll back your software, follow these
steps:
1. Connect the device to your laptop and open the Welch Allyn Service Tool.
2. Click the Configure tab.
Service manual Options and upgrades 127
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