LTE Modem and USB Add-on v1 Datasheet
Table of contents
- Board Connections and I/O
- Specifications
- Physical Specification
- Radio Specification
- VOXL-ACC-LTEH-NA
- VOXL-ACC-LTEH-DOD / World
- SIM Cards and Supported Networks
- LEDs
- Status LEDs
- USB LEDs
- Connector Pinouts
- J11 - Serial Debug Port
- J16 - USB Port 1
- J17 - USB Port 2
- RF Characteristics
- Environmental
- Operating Temperature
- Emergency Boot Switch
Manual
Board Connections and I/O

Specifications
Physical Specification
Specicifcation |
Value |
Weight |
12g |
Dimensions |
37.1 x 43.18mm |
Downstream USB ports |
2 |
Cellular 3GPP Bands Supported |
LTE 2, 4, 5, 12 WCDMA 2, 5 |
WWAN Antenna Connectors (MIMO) |
UFL-R-SMT-110 |
Recommend Antennas |
W3907B0100 |
Debug Console Connector |
SM04B-SRSS-TBLFSN |
Debug Console Mating Connector |
SHR-04V-S-B |
USB2 Host Connectors |
4 Position JST GH, Vertical, BM04B-GHS-TBT |
USB2 Host Mating Connector |
JST GHR-04V-S |
J7 Connector (bottom of board) |
Samtec Inc, MPN: QTH-030-01-F-D-K |
J7 Mating Connector |
Samtec Inc., MPN: QSH-030-01-L-D-A-K |

Radio Specification
VOXL-ACC-LTEH-NA
Specicifcation |
Value |
North America CAT4 LTE Bands |
2, 4, 5, 12, 3GPP release 10 |
Bandwidth |
up to 150/50 Mbps Download/Upload |
3G Fallback |
UMTS/WCDMA bands 2/5, 3GPP release 8 |
VOXL-ACC-LTEH-DOD / World
The ModalLink system uses Band 3 modems to operate in the DOD’s 1800MHz spectrum. The same add-on board can be used for international use.
Specicifcation |
Value |
CAT4 LTE Band |
1,2,3,5,7,8,20,28,38,40 |
Bandwidth |
up to 150/50 Mbps Download/Upload |
SIM Cards and Supported Networks
The modem card requires the use of a Nano SIM card.
AT&T, Verizon and T-Mobile are supported. For Band 3 support, the VOXL-ACC-LTEH-DOD
modem is requiered and Band 3 SIM cards need to be requested through ModalAI.
LEDs
Status LEDs
LED |
Description |
PWR |
Illuminates GREEN when the board is powered |
MODEM |
Illuminates GREEN when the modem is powered |
WWAN |
Illuminates solid BLUE when connected to the network |
USB LEDs
The Modem USB Power
and USB Port Power
LEDs illuminate green to indicate the USB bus and ports are powered
Connector Pinouts
J11 - Serial Debug Port
- Connector - BM04B-SRSS-TB
- Mating Connector - SHR-04V-S-B
Pin |
Description |
1 |
3.3 VDC |
2 |
UART_RX_3P3V |
3 |
UART_TX_3P3V |
4 |
GND |
J16 - USB Port 1
- Connector - 4 Position JST GH, Vertical, BM04B-GHS-TBT
- Mating Connector - JST GHR-04V-S
Pin |
Description |
1 |
5VDC (500mA max) |
2 |
D- |
3 |
D+ |
3 |
GND |
J17 - USB Port 2
- Connector - 4 Position JST GH, Vertical, BM04B-GHS-TBT
- Mating Connector - JST GHR-04V-S
Pin |
Description |
1 |
5VDC (500mA max) |
2 |
D- |
3 |
D+ |
3 |
GND |
RF Characteristics
Specicifcation |
Value (3GPP) |
TX Power (LTE) |
23 dBm (typical) |
TX Power (WCDMA) |
24 dBm (typical) |
RX Sensitivity (LTE) |
-102 dBm (typical) |
RX Sensitivity (WCDMA) |
-110 dBm (typical) |
Environmental
Operating Temperature
Parameter |
Min |
Max |
Unit |
LTE System Functional |
-40 |
+60 |
ºC |
Module Functional |
-40 |
+85 |
ºC |
Module 3GPP Compliant |
-20 |
+60 |
ºC |
Emergency Boot Switch
Typically left in the OFF
state, this switch can be used to enable emergency boot
mode. More information can be found here.