I've been looking for MIBs supported by this ATA SPA112 but I have not found any specific MIB for the ATA.
According to the ATA documentation:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/csbpvga/spa100-200/admin_guide_SPA100/spa100_ag.pdf
SNMP v2 is supported on this device.
The intention is to monitor Registration State and Hook State and such.
So far, this is the only MIB containing something similar, but it establishes it is for FXO, FXS or E&M ports on a router.
Would this MIB work as well in the ATA SPA112?