Mushroom Networks Documentation

How do I find IMEI and other detailed information about my cellular modems?

This information is only available in firmware version 1.18.0 and higher.

Cellular WAN GUI Table

At the bottom of the HOME tab of the GUI there is a table summarizing the Cellular WAN status, as show below:


This table shows that there are 2 cellular modems currently active.

The various fields are:

Interface:  This identifies the particular interface by an index number.

IP Address:  This lists the IP Address for the particular modem.

Signal:  This shows the signal quality (percentage), strength (dBm), and protocol.  The percentage values are indicators of signal quality.  Values above about 50% are considered fairly good quality signals.  Values below about 20% indicate roaming threshold, and values less than about 10% are essentially unusable.  The signal strength dBm (“decibels relative to 1 milliwatt”) values refer to absolute signal power levels at the modem.  For modem #1, the signal is at 54% (-79 dBm) and the modem should operate satisfactorily.  For modem #2, the signal is at 80% (-63 dBm) so this signal is relatively high quality/strength.  Both modems are using the LTE protocol. 

Status:  Shows the connection status and will normally cycle during boot between “Modem Detected” -> “Initializing” -> “PPP Initializing” -> “Trying to Connect” -> “Connected”.  If the modem cannot connect the status will be “PPP Failed”. 

RTT:  This is the Round Trip Time for packets and is presented as a ratio.  On Interface 1, the RTT is 90:1, which means 90 msec.

Carrier/Type:  This shows the name of the broadband carrier network.

Download/Upload:  This shows the amount of data transferred via this particular interface (for the current session), in both downstream and upstream directions, and measured in Kbps.

Peak:  This shows the maximum, peak values for download and upload over the current session, in Kbps.

Cellular WAN Detailed Connection Status Information

Additional detailed status information about each modem can be obtained by clicking on the “Carrier Type” for the particular interface you are interested in, as shown below.  Note that typically only a subset of the below fields are populated, depending on the information provided by the ISP/Manufacturer.


The following information is presented:

Modem Name:  Contains the manufacturer and model number.

Firmware:  Contains modem firmware identification number.

IMEI:  International Mobile Equipment Identity. Contains the unique modem hardware identifier.

IMSI:  International Mobile Subscriber Identity. Contains the unique subscriber identity.

ICCID:  Integrated Circuit Card Identifier. Contains the identifier of the actual SIM card itself.

Registration Status:  Contains current registration status. Possible states are “Not Registered”, “Searching”, “Registered”, “Registration Denied”.

PDP Context:  Packet Data Protocol Context status. Possible states are “Not Registered”, “Searching”, “Registered”, “Registration Denied”.

Base Station ID:  Contains the ID of the current Base Station.

ARFCN:  Absolute Radio Frequency Channel Number.  The mapping from Channel Number to frequency is dependent on both technology (3G vs 4G) and geographical location.  Note that this number may be useful in troubleshooting poor performance.

Signal Strength (dBm):  Received signal strength in dBm.  The computation of this is different for 3G vs. 4G LTE. 

3G systems use RSSI, Received Signal Strength Indicator, and the following table:

4G/LTE systems use RSRP, Reference Signal Received Power, and the following table:

Signal Quality (dB):   Received signal quality in dB.  The computation of this is different for 3G vs. 4G LTE. 

3G systems use ECIO, Energy to Interference Ratio, and the following table:

4G/LTE systems use RSRP, Reference Signal Received Power, and the following table:

Roaming Status:  Shows either “Not Roaming” or “Roaming”.


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