SIM Card CI Class

[David Field]

I'm currently looking at tracking SIM Cards in the the ServiceNow CMDB, and there is the SIM Card (cmdb_ci_sim_card) available for this purpose, but a thing that strikes me as odd is that there isn't a reference field to link a SIM Card CI to the device CI it is installed in.

I don't feel like a relationship entry is the correct place for this type of information, so I'm wondering what ServiceNow were thinking regarding use cases for this class of CI?

I know I could add a suitable reference field, or just add fields to the Communication Device class to capture the same sort of data, but I wanted to be sure I'm not missing the way this class was intended to be used.

[David Field]

Hi,

 Philippes solution is much more refined than my own, in the end I didn't even go as far as extending the the Handheld Computing Device table, I just created a new reference field back to Configuration Item as the customer had 'things' with SIMs all over the CMDB, not just in the Handheld Computing Device table. 

I find it frustrating that the 'Handheld Computing Device' class is named so, there are many devices that can now have SIMs installed, IMEI numbers, etc and they aren't all handheld.

[Philippe]

I think that's why they called it Handhled Computing Device actually since mobile phones or tablets are little computers with a hostname, ip nowdays. The class is generic and not only used to track phones but all ... handheld devices.
I extended the class for two reasons :

1. I don't want to modify the OOB class;
2. Since the class is generic, mobile phone is an extended usage, so an extended class makes sense for me.

Regards,

[David Field]

Absolutely agree with your approach. 

Handheld Computing Device doesn't really apply to some of the devices (e.g. full size cabinet or 'smart' lockers, routers, etc) that we have SIMS installed in 🙂