Open telemetry reference
How printer monitoring works
CloudToner combines standard read-only SNMP data with IPP identity, status and consumable attributes. When one response is incomplete, the scanner keeps the useful fields and tries the next safe source.
Step by step
The discovery sequence
- 1Find likely printers
Check standard printer services without treating an open port as toner data.
- 2Read SNMP v2c
Collect standard identity, counters, supplies, status and alerts.
- 3Retry partial results with v1
Keep the v2c evidence, then merge any richer v1 fields instead of starting over.
- 4Enrich with IPP
Request printer identity, state reasons and available supply percentages.
- 5Use only measured levels for automation
Unknown or “some remaining” values stay visible but cannot trigger an automatic order.
Live scanner reference
Search the OID registry
These are the read-only OIDs CloudToner uses to identify printers and collect counters, toner levels and faults. Vendor-private entries are clearly labelled.
System description
Device-provided make, model, firmware or controller description.
.1.3.6.1.2.1.1.1.0System object identifier
Enterprise object identifier used as a vendor or print-server hint.
.1.3.6.1.2.1.1.2.0System uptime
Time since the device network management service restarted.
.1.3.6.1.2.1.1.3.0System name
Configured device hostname or network node name.
.1.3.6.1.2.1.1.5.0Host device type
Confirms that a Host-Resources device row is a printer.
.1.3.6.1.2.1.25.3.2.1.2Host device description
Model or device description associated with the printer row.
.1.3.6.1.2.1.25.3.2.1.3Host device status
Running, warning, testing or down state for the printer device.
.1.3.6.1.2.1.25.3.2.1.5Printer status
Printer-specific idle, printing, warm-up or unknown state.
.1.3.6.1.2.1.25.3.5.1.1Detected printer errors
Bit field for conditions such as low toner, no paper, a jam or offline state.
.1.3.6.1.2.1.25.3.5.1.2Printer name
Human-readable printer name from Printer-MIB.
.1.3.6.1.2.1.43.5.1.1.16Printer serial number
Manufacturer serial number used for durable printer identity.
.1.3.6.1.2.1.43.5.1.1.17Marker counter unit
Unit for each lifetime counter, such as impressions or sheets.
.1.3.6.1.2.1.43.10.2.1.3Marker lifetime count
Lifetime page, sheet or impression counter reported by the print engine.
.1.3.6.1.2.1.43.10.2.1.4Supply colour index
Links a supply row to its colourant row.
.1.3.6.1.2.1.43.11.1.1.3Supply class
Identifies a consumed supply or a waste receptacle.
.1.3.6.1.2.1.43.11.1.1.4Supply type
Toner, cartridge, drum, fuser, transfer unit or another supply type.
.1.3.6.1.2.1.43.11.1.1.5Supply description
Device-provided label for a cartridge or maintenance item.
.1.3.6.1.2.1.43.11.1.1.6Supply unit
Measurement unit for capacity and remaining level, including percent.
.1.3.6.1.2.1.43.11.1.1.7Supply maximum capacity
Maximum measurable capacity used with the current level to calculate a percentage.
.1.3.6.1.2.1.43.11.1.1.8Current supply level
Current toner or maintenance level; negative values are explicit unknown-state sentinels.
.1.3.6.1.2.1.43.11.1.1.9Colourant value
Human-readable colour name used to map supply rows to black, cyan, magenta or yellow.
.1.3.6.1.2.1.43.12.1.1.4Alert severity
Severity of an active Printer-MIB alert.
.1.3.6.1.2.1.43.18.1.1.2Alert group
Printer sub-unit responsible for an alert, such as marker supply or media path.
.1.3.6.1.2.1.43.18.1.1.4Alert code
Standard Printer-MIB condition code for the active alert.
.1.3.6.1.2.1.43.18.1.1.7Alert description
Device-provided text describing the current condition.
.1.3.6.1.2.1.43.18.1.1.8Alert time
Device uptime tick when the alert was raised.
.1.3.6.1.2.1.43.18.1.1.9Brother: Brother Mobile Status
Model-scoped private probe for Brother. Documented but disabled until a supported device fixture verifies the value.
.1.3.6.1.4.1.2435.3.3.9.1.6.1.0Why a toner can show “—”
Printer-MIB supply states
A printer can identify its cartridges without reporting a numeric percentage. CloudToner preserves those distinctions instead of inventing a level.
- -1
- Other: the device does not constrain this value.
- -2
- Unknown: the device cannot report a current quantity.
- -3
- Some remaining: the device knows supply remains but cannot provide a number.
Safety and trust
What the scanner checks
- Read standard MIB and IPP attributes
- Bound walks, response sizes and timeouts
- Merge richer fields without downgrading known identity
- Never issue SNMP SET or submit print jobs
- Never treat estimated toner as automation-grade telemetry
Tracked deliberately
Vendor-specific coverage
Standard OIDs remain preferred. Private probes stay disabled until official documentation and a real model fixture prove the returned value.