Would you be able to connect your Rossini with Vivaldi clock? Clock is much more important than upsampler(in my personal opinion)
Oh. I did forget to connect rs232. Because I connect them by following pictures.
As you can see, there are 3 aes cables between Transport and upsampler. But only 3 in the this. Really getting confused now. 
The clock does not have the necessary connectivity as it has little to display that is not available to see from the other Vivaldi components it is connected to e.g. what clock rate is being used where.
If you look at the triple connector RS232 connector each one has a label indicating the component it connects to. You don’t actually need to look at the manual. NB: Music data/signal connections such as AES or wordclock have nothing to do with this communication bus.
Yes, not only can I connect the Rossini Transport to Vivaldi clock but I do. It is only the communication bus that is not compatible.
Hi Pete
Oh. That’s good. Communication is not that important.
I think there are some problems with DAC’s RS232 port.
Because of the previous trip, the USB interface of DAC can no longer be used.(But I can replace it with the upsampler’s USB interface.)
Maybe rs232 has been implicated. So even if I connected them according to the instructions on the rs232 cable, my App still couldn’t display the version and serial number.
I am afraid that if the ports have been damaged there is nothing one can do except return it for servicing.
Hi Pete,
Yes. I think so. But I have to wait half year or two years…
I can image the life without them. 
But I think that is not serious problem. Because everything work perfectly except rs232 and USB interface on the DAC.
Especially I have the upsampler, I can rely on its USB interface.
Yes, I forgot that your dealer is in China. Also I don’t think that dCS has a presence in NZ (at least according to their map of dealers). Given your circumstances I wonder if it might be possible arrange to use the Australian distributor? Still a long way away but the closest to you. Perhaps you could try contacting dCS directly , explain your unusual situation and see if this idea is workable.
Anyway if you are unable to connect DAC and Upsampler through the communication bus this at least provides a clear answer to your subject line question " Can I use upsampler to update dac?" . The answer given the current situation is no.
Hi Pete,
Sorry for bothering you again.
I can see the DAC version and temperature now. But I still can’t read serial number from the App. Do you have any idea?
By the way Zanah, actually, Yes you can upgrade the DAC through the Upsampler even though your Upsampler has a more up-to-date firmware than the DAC.
dCS’s Vivaldi DAC 2.11 firmware was distributed as a 16/44.1 .wav file either on a CD disc or as a zipped file from their distributors (I still have my disc 
).
The process of updating the DAC’s firmware is to send that .wav firmware file to the DAC while it’s in update mode (ie. Menu —> Information —> Update). The firmware has to be sent to the DAC bit-perfectly, and it does not matter how it’s sent;
There’s no need to worry about the RS232 connection/cable between the Upsampler and DAC during this update, and can be installed post upgrade. 
Hi Anup,
Thank you very much for your information!
That is because you are looking at a different Mosaic screen . Your screenshot is of the Version screen. The serial number is shown on the Status screen ( see your earlier screenshot), If you select the Device and Audio screens can you see and operate all of the DAC control options?
Hi Pete,
I can’t see the serial number.
Also, before I connect the RS232 cable, I can’t read the DAC version. But I can see it now. But the USB board version is 0.00. As I said before, I can’t use DAC’s interface, will it be possible, is it possible that the driver of my device is missing, rather than the hardware is damaged?
Great information Anup but I think that the OP was referring to using Upsampler/Mosaic to update DAC as per his first screenshot showing an update option for the network board. In that case Mosaic cannot see the DAC without the communication bus being connected. He was also concerned at this warning from the release notes about the need to install 2.11 ( DAC) and 2.10 ( Upsampler) at the same time which he cannot now do. Further he has two updates missing from DAC, 2.02 and 2.11 and I seem to remember a correspondent here last year running into some sort of Catch 22 situation over a similar issue:
He has a Vivaldi transport and has already ordered the CD from his dealer in China so, as your first bullet point shows, he does not need to use the Upsampler or even have it connected to perform the DAC update. But can he install 2.11 without first installing 2.02?
DAC USB Board should be 1.00. you mentioned that this port does not operate. I don’t think it is a USB driver issue . If you look at Mosaic Device screen DAC USB Audio Class should show USB class 1 or Class 2. even if there is no connection to the port. Can you see this?
Ahhh, right, apologies. I misunderstood 
Good question. I’d imagine it would be ok to jump straight to 2.11, but more appropriate for @James or someone from dCS to comment about going direct to the latest firmware.
Yes he can. I thought there had been a previous thread on this and James said in July '20
James had a typo there, 2.10 should read 2.11.
Is this with the RS323 cable linking the units as your screenshot looks like the upsampler is only finding itself. Basically the screen in your shot should look similar to this:
Hi Pete,
Mine screen only shows the upsampler.
That’s why I think it lost the driver. Hope update to 2.11 will make some good changes.
I will keep my fingers crossed for you. You may be right as we do know that v.2.01 DAC and v.2.10 Upsampler cannot communicate according to the 2.11/2.10 release notes.
Hi Pete,
After you replying. I did know that. Thank you so much for your help!
You are always helpful! 🫂
