Not at books atm :-(
p. 268, Accessories table
In SR5 this was specifically a
commlink accessory (remember having this discussion before).
But I guess since rules in SR6 are deliberately less defined it is probably a lot easier to interpret it as if this accessory can also be used for RCCs (as well as other devices perhaps?).
you can already do cold-sim if you network it with your commlink
In SR5 it was clear that you either used a commlink (which were cheap and could give you access to its SIM module if it was modded by one) or you used a RCC (which gave you access to its multiple parallel channels, sharing and noise reduction etc) - if you wanted to switch between them you had to reboot both devices.
In SR6 rules are (in general) a lot less clear. Having said that it seem as if you can have multiple devices in the network at least for the purpose of providing firewall and data processing attribute arrays you can pick from, but possible also to enable you to access the matrix via a RCC while at the same time going into VR by using the SIM module provided by your commlink that is part of the same network...?
Not sure where to draw the line actually. For example, it doesn't seem to be intended that you can access the matrix via a RCC while at the same time having a cyberdeck in your network providing you with Attack and Sleaze attributes....
commlinks come with normal sim modules by default.
This changed?
In SR5 commlinks typically only came with a SIM module by default if they were implanted
Otherwise you had to get the SIM module commlink accessory.
(for riggers sim SIM module came default with their Control Rig implant and for deckers it came, also with hot-sim, as default in Cyberdecks).