# SNMP Not Updating Serial Port Signal Status
**URL:** https://forums.digi.com/t/snmp-not-updating-serial-port-signal-status/37786
**Category:** Portserver TS
**Tags:** snmp, portserver
**Created:** [August 28, 2025, 4:11pm UTC](https://forums.digi.com/t/snmp-not-updating-serial-port-signal-status/37786 "2025-08-28T16:11:23Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@scotch52](https://forums.digi.com/u/scotch52)
#### Post date: [August 28, 2025, 4:11pm UTC](https://forums.digi.com/t/snmp-not-updating-serial-port-signal-status/37786/1 "2025-08-28T16:11:23Z")
Hi All -
I am attempting to monitor a few Digi PortServer TS 2 devices using SNMP. I am able to query the devices with SNMP and am getting results back for various OIDs however the specific OIDs I am interested in don’t seem to be updating with current values as displayed in the CLI.
CLI:
#\> display port
Serial port activity:
Port TX RX RTS CTS DSR DCD DTR RI OFC IFC
1 off off off off off off off off off off
2 off off on on on on on off off off
SNMP WALK:
.1.3.6.1.4.1.332.10.11.13.13.1.12.1 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.12.2 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.13.1 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.13.2 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.14.1 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.14.2 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.15.1 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.15.2 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.16.1 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.16.2 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.17.1 = INTEGER: 0
.1.3.6.1.4.1.332.10.11.13.13.1.17.2 = INTEGER: 0
I believe these OIDs are for reporting the serial port signal status - but I could be wrong about this. Am I monitoring the correct SNMP OIDs to report on the serial port signal statuses? I would very much like to see DTR, DCD, DSR, RTS, CTS, etc using SNMP rather than using telnet as it ties up a tty. The specific problem I am seeing is that the SNMP OIDs all seem to always report a state of 0 (off) for each signal line while the CLI reports that the signal status is active. There appears to be a disconnect between the SNMP status and the CLI. Any ideas on different OIDs to monitor or how to resolve this discrepancy would be appreciated.
Regards,
Scott
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### Author:  [@mvut](https://forums.digi.com/u/mvut)
#### Post date: [September 9, 2025, 5:24pm UTC](https://forums.digi.com/t/snmp-not-updating-serial-port-signal-status/37786/2 "2025-09-09T17:24:29Z")
I don’t support the Terminal Server products, but I don’t think SNMP will update a given COM port. What I would suggest is looking at [Digi One Family and PortServer TS Family](https://docs.digi.com/resources/documentation/digidocs/90000583/default.htm#container/cont_snmp_about.htm?Highlight=SNMP%20messages) it is possible that the MIB function may be able to be updated via the SNMP management agent.
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### Author:  [@michaelt](https://forums.digi.com/u/michaelt)
#### Post date: [February 2, 2026, 4:16pm UTC](https://forums.digi.com/t/snmp-not-updating-serial-port-signal-status/37786/3 "2026-02-02T16:16:26Z")
@scotch52 Here is the page where the MIBs for your product can be found:
[https://hub.digi.com/support/products/infrastructure-management/digi-portserver-ts/](https://hub.digi.com/support/products/infrastructure-management/digi-portserver-ts/)
The latest firmware for your product can be found on that page as well. Making sure your firmware is up to date, and that the proper MIBs are in use with your SNMP software, are how to give yourself the best chances of success. The product-line itself is EOL, therefore the development period for the product’s OS has ended.
If interested in moving to a currently supported device, my recommendation would be the Digi Connect EZ 4: [Digi Connect EZ Mini/2/4 - RS-232/422/485 Serial Over IP Device Server | Digi International](https://www.digi.com/products/networking/infrastructure-management/serial-connectivity/device-servers/digi-connect-ez#partnumbers)
SNMP support for the model above listed here: [Digi Connect EZ Mini/2/4 - RS-232/422/485 Serial Over IP Device Server | Digi International](https://www.digi.com/products/networking/infrastructure-management/serial-connectivity/device-servers/digi-connect-ez#specifications)