Applicable Products Part number Description
ZETA-GEP-LTE4 (EU) Low Power LTE Cat 4 European Modem with GPIO and GNSS
ZETA-G-GPRS Entry Level GPRS Modem with GNSS (GL)
ZETA-N2-GPRS Entry Level GPRS Modem (GL)
ZETA-NEP-LTE4 (EU) Low Power LTE Cat 4 European Modem with GPIO
ZETA-NEP-LTEM (GL) Low Power Global LTE Cat M Modem with GPIO
ZETA-NLP-LTE1 (EU) Ultra Low Power European LTE Cat 1 Modem
ZETA-NLP-LTEM (GL) Ultra Low Power Global LTE Cat M Modem
ZETA-N-LTE (EU) High Performance LTE Cat 4 Modem with GPIO
ZETA-NSP-LTE1 (EU) Low Power European LTE Cat 1 Modem
Objective All industrial modems requires initial set up, so that they can communicate with other modems on the cellular networks using AT commands. This application note shows how this is done for Siretta ZETA modems and ensure that the modem is correctly configured to communicate over cellular network.
Demonstration of Solution Resources:
PC with an installed Terminal Emulator' program: A Windows 10 laptop installed with Tera Term was used for the purpose of this guide.
Siretta Part Number: 61057 -ZETA-GEP-LTE4 (EU) Starter Kit (any ZETA starter Kit is suitable for this application)
Insert SIM card to the modem
Power on the modem
Connect the supplied serial port cable to the PC
Connect the antenna
As described in the Starter Kit Quick Start Guide
Open Hyperterminal on the PC (or your preferred terminal emulator: PuTTY, TeraTerm).
Select new connection. Name the new connection for reference in the future.
Name your port.
8. Choose the correct COM port. From the drop-down list, select the correct COM port your modem is connected to.
9. Configure the port with the following settings (These settings are standard for all of the ZETA Siretta modems):
Bits per second: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: Hardware
10. Click Apply
11. Send the initial AT' command to determine the serial communication with the modem is working correctly. If communication is successful. you will get an OK' response from the modem. You can then issue any other commands as required.
Commands to Check System is Working
Check Serial Port is Working
AT
//Receive following when successful:
OK
Set Verbose Error Reporting
AT CMEE=2
//Receive following when successful:
OK
Commands for Basic Operation
Check PIN Registration
AT CPIN?
//Receive following when successful:
CPIN: READY
OK
//Receive following when SIM is not inserted:
CME ERROR: SIM not inserted
//Receive following when SIM requires a PIN code:
CME ERROR: SIM pin
Query Firmware Version
AT GMR
//Receive following when successful:
Firmware version (make a note of this)
Query IMEI Number
AT CGSN
//Receive following when successful:
IMEI number (make a note of this)
Cellular Network Operation Set Network Registration to ALL'
AT COPS=0
//Receive following when successful:
OK
Check Network Registration
AT CREG?
//Receive following when registered to a local network:
CREG: 0,1
//Receive following when registered to a roaming network:
CREG: 0,5
//Receive following when not registered to a network:
CREG: 0,0
//Receive following when not searching for a network:
CREG: 0,2
//Receive following when registration is denied:
CREG: 0,3
NOTE:
When experiencing registration problems, check the following:
1) Antenna is connected and screwed in tightly to unit
2) SIM is valid and has credit / active
3) SIM is setup for 2G / 3G / 4G services
4) SIM is SMS enabled
5) There is signal available for the cellular network in use
6) Ensure more than 15 seconds has elapsed since power up.
Check Network Signal Strength AT CSQ
//Receive signal value >9 when successful:
CSQ: 23,1
//Receive signal value =99 when there is no signal:
CSQ: 99,1
//Receive signal value less than 9 when there are network connectivity issues:
CSQ: 3,1
NOTE:
When experiencing bad network signal strength (less than 9), check the following:
1) Antenna is suitable for network in use and is tightly screwed to unit
2) There is good signal available for the cellular network in the area
3) Move the antenna near a window or preferably outside
4) Move the antenna to an elevated position (> 3M high)
5) Use a high gain antenna
6) Ensure short cable length (less than 3M) for cable connecting antenna to modem
GPRS Network Operation Check GPRS Context Availability
AT CGATT?
//Receive following when successful:
CGATT: 1
OK
//Receive following when content is not available or not enabled:
CGATT: 0
OK
Set GPRS APN For Your Network
AT CGDCONT=1, IP , APN Name
//Receive following when successful:
OK
NOTE:
To configure the APN name correctly, follow these steps :
1) Navigate to the following link: Common Global APN Settings
2) Select the country you are in (If your country is not listed please contact Siretta)
3) Select the network from the list (If your network is not listed please contact Siretta)
4) Insert the APN name from the table in to the APN Name field in the AT CGDCONT' command
Connect To GPRS Context AT#SGACT=1,1, APN Username , APN Password
//Receive following when successful (Where x.x.x.x is your assigned IP address):
#SGACT: x.x.x.x
OK
//Receive following when the APN Name / APN Username / APN Password is incorrect:
ERROR
NOTE:
To configure the APN username and password correctly, follow these steps:
1) Navigate to the following link: Common Global APN Settings
2) Select the country you are in (If your country is not listed please contact Siretta)
3) Select the network from the list (If your network is not listed please contact Siretta)
4) Insert the APN username from the table in to the APN Username field in the AT#SGACT' command
5) Insert the APN password from the table in to the APN Password field in the AT#SGACT' command.
Setup T
Europe Stories
05/01/2027
Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be ...
06/09/2026
June 9 2026, 23:00 (PDT) Dolby and MagentaTV Bring Fans Closer to the FIFA Worl...
04/08/2026
Dalet, a leading technology and service provider for media-rich organizations, t...
04/07/2026
April 7 2026, 19:00 (PDT) Detective Conan: Fallen Angel of the Highway Opens in...
14/06/2026
Library captures 1960s R&B/pop drum sound
Following on from their recent wave of plug-in effects, Iconic Instruments have just launched an all-new virtual d...
13/06/2026
Latest expansion pack includes 252 presets
Devious Machines have recently introduced another expansion for their powerful multi-effects plug-in, Infiltrator...
13/06/2026
Create custom DAW/plug-in controllers using prompts
MetaGrid have recently introduced an all-new AI Builder function to their touchscreen-based control surf...
12/06/2026
Simple Steps to Better Acoustics - Taming The Small Room
Most of us mix in spare rooms and small spaces, where the acoustics fight us at every turn. At Gear...
12/06/2026
Latest addition expands vintage-inspired effects palette
Meris' Ottobit pedal range draws its inspiration from vintage gaming consoles, and the latest a...
12/06/2026
Soundbox-based chamber strings series expanded
Sonora Cinematic have just announced the launch of the second instalment in their Soundbox-based chamber stri...
12/06/2026
With John Daro, DI Colourist at Warner Bros. Water Tower Color Tuesday 23 June, 10am-1pm or 3-6pm
Restar Corporation
Tokyo
Register here
John Daro is the ...
12/06/2026
Meet The Grumpy Onion Ireland's newest online sensation, all he wants is to ...
12/06/2026
RT stays Up All Night with brand new daily 2026 FIFA World Cup Vodcast
Adding to the fun around 2026 FIFA World Cup tournament, RT has launched a brand new d...
11/06/2026
As podcast formats evolve in the streaming era, podcasting needs updated, transp...
11/06/2026
As Spotify's global RADAR program enters its sixth year in Italy, a new class of artists is stepping into the spotlight. Today, we're announcing the six...
11/06/2026
Pride Month is a time for celebration, reflection, and amplifying the diverse stories and perspectives from the LGBTQIA+ community that enrich our world. To hel...
11/06/2026
First in new line of muted string libraries
VSL have just announced the launch of two new string libraries that represent the first two instalments in a new...
11/06/2026
New colour option for 61-key Launchkey MK4
At Superbooth 2025, Novation introduced the Launchkey Mini 37 White and Launchkey 49 White, bringing an additiona...
11/06/2026
Larger, but still compact!
Arturia's popular compact MIDI controller keyboard is now available in a, well, slightly less compact version! The new MiniLa...
11/06/2026
Eurosatory 2026: Rohde & Schwarz shapes the new-generation battlefield Rohde & Schwarz unveils next generation SIGINT/EW and CUAS solutions on uncrewed system...
11/06/2026
Rohde & Schwarz unveils NEMACS - Directional, ultra secure connectivity for the ...
11/06/2026
Thursday 11 June 2026
Daisy May Cooper rallies the nation ahead of ICC Women's T20 World CupTurn on cookies to view this content. Go to Privacy options and...
11/06/2026
Summer solstice shows from C il House and Late Date from 9pm on Saturday 20 Jun...
10/06/2026
Get Hands-On with Interfaces & Mic Preamp Brands
If youre after a new interface or preamp, then GearExpo UK is the place to be! Well have a whole host of au...
10/06/2026
November 13-14 2026, The Midway, San Francisco
Following their recent rebranding, MONO Music Conference (formerly Music Expo) have officially announced thei...
10/06/2026
Debut instrument free for limited time
deFORM is the debut release from newly founded developer ebbandflow, and it's being offered as a free download fo...
10/06/2026
Rohde & Schwarz and TRUMPF advance laser-based drone defense with THORIS LCS Rohde & Schwarz is showcasing THORIS at ILA 2026: A sovereign, end to end counter...
10/06/2026
MAHLE and Rohde & Schwarz develop application for sensor testing of modern drive...
10/06/2026
10 Jun 2026
VEON's Banglalink Brings Every World Cup 2026 Match to Football...
10/06/2026
Wednesday 10 June 2026
How to watch every ICC Women's T20 World Cup 2026 match live on Sky Sports
Where is the ICC Women's T20 World Cup 2026 availabl...
10/06/2026
Wednesday 10 June 2026
P RLA brings first-ever Beautifully Clean Oral Care'...
10/06/2026
Wednesday 10 June 2026
Sky reveals pulse-pounding first teaser trailer for upco...
10/06/2026
Wuppertal June 10, 2026
Riedel Artist at the Heart of the 14th World Live Neurovascular ConferenceAt the 14th World Live Neurovascular Conference (WLNC) in Li...
09/06/2026
Last month, Spotify hosted PURE FLOWERS LIVE, a special event celebrating the re...
09/06/2026
Last month, RADAR U.K. artist Skye Newman took the stage in East London for a sp...
09/06/2026
Company to cease operating on 30 June 2026
Australian loudspeaker and amplifier manufacturer Wayne Jones Audio have announced that after much consideration,...
09/06/2026
Increases low-end weight and character
The latest plug-in release from Sheffield-based fedDSP aims to offer an all-in-one solution for users in search of mo...
09/06/2026
Introduces AI Studio Assistant, Moises Studio integration & more
Fender Studio have just announced the launch of a significant update that brings an array o...
09/06/2026
The BBC has found its Hercule Poirot.
After Deadline revealed last month that t...
09/06/2026
Filming to take place in Holmfirth
9th June 2026, London: U&GOLD is heading bac...
09/06/2026
X-Rite Pantone Launches Offset360 to Modernize Color Control Across Existing Pre...
09/06/2026
09 Jun 2026
VEON Appoints Serkan Ozturk as Chief of Staff & Strategy Officer Dubai and New York, June 9, 2026 - VEON Ltd. (NASDAQ: VEON), a global digital oper...
09/06/2026
Tuesday 9 June 2026
Katie Price: Nothing to Hide, a candid and unfiltered accou...
09/06/2026
Enni Continues to Rely on Arvato Systems - And Will Be Using AEP.EnerS4 Billing Solution
Arvato Systems to implement transformation project for SAP S/4HANA Ut...
09/06/2026
These special programmes will highlight RT 's connection with the Irish diaspora
This year, RT is marking 100 years of public broadcasting in Ireland with...
08/06/2026
At Spotify, our commitment to the LGBTQIA community is year-round. Through GLOW, our global music program, we celebrate and amplify the contributions of queer ...
08/06/2026
Get Hands-on With Keyboard & Synth Brands
GearExpo UK wouldn't be complete without some synth action, and we've got some of the industry's most ...
08/06/2026
50 popular in-ear monitoring system profiles added
The latest update for IK Multimedia's headphone-correction system has just arrived, and introduces ca...
Applicable Products Part number Description 
