PSM Calculation Tool

PSM Value Decoder (TAU, act.time)

With our PSM Value Decoder, you can enter the display commands and/or the URCs in the field below, which can then be decoded into binary format. The outputs of display commands can be entered to get the binary values calculated into real-time in days, hours & seconds.

T3412 and T3324 Value Decoder Tool

Example Commands

You can enter the output line of either AT+CPSMS? or AT+CEREG? or CEREG-URC in case CEREG=4 or CEREG=5. For example:

AT+CPSMS CMD Generation

How to use this PSM calculator

The PSM calculation tool helps you to generate the correct AT-cmd syntax for the 3GPP specified at-cmd AT+CPSMS (according to 3GPP 24.008 and 27.007).

There are 2 values which can be adjusted:

• T3412 — defining the periodic Tracking Area Update value
• T3324 — setting the Active Time

These values need to be entered in an 8-bit binary format where the first 3 bits represent the base multiplier of a 5 bit binary number.

PSM Calculator

at+cpsms=1,,,011,

at+cpsms=1,,,100,

at+cpsms=1,,,101,

at+cpsms=1,,,000,

at+cpsms=1,,,001,

at+cpsms=1,,,010,

at+cpsms=1,,,110,