I have no idea what "normal" is for cable modems, but here are the details from mine (I'm not having any problems...at home that is)
Model Name: SB6121
Vendor Name: Motorola
Firmware Name: SB_KOMODO-1.0.6.10-SCM00-NOSH
Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3
Hardware Version: 5.0
Firmware Build Time: Oct 29 2012 18:07:13