MBIM modem issue -Telit LM960A18

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MBIM modem issue -Telit LM960A18

Arkadiusz Majewski
 Hello,

I have an issue with Telit LM960A18 LTE modem.
I use MBIM and it works as it works.

1. Modem is discovered as proper device.
2. Modem transmits data in both directions.

The issue is the signal RSSI is poor. Four antennas are connected
properly because I use the same hardware configuration for Windows and
there is -53 dBm.


umb0: flags=8851<UP,POINTOPOINT,RUNNING,SIMPLEX,MULTICAST> mtu 1500
� � � � � � �  index 11 priority 6 llprio 3
� � � � � � �  roaming disabled registration home network
� � � � � � �  state up cell-class LTE rssi -101dBm speed 1.0Gps up
1.0Gps down
� � � � � � �  SIM initialized PIN valid (3 attempts left)
� � � � � � �  subscriber-id 260021 ICC-id 8948022 provider T-Mobile.pl
� � � � � � �  device LM960A18 IMEI 356299 firmware 32.00.115-B007
� � � � � � �  phone# +48600 APN data
� � � � � � �  dns 213.158.199.1 213.158.199.5
� � � � � � �  groups: egress
� � � � � � �  status: active
� � � � � � �  inet 178.183. --> 178.183. netmask 0xffffffc0


serv# usbdevs -v
Controller /dev/usb0:
addr 01: 8086:0000 Intel, xHCI root hub
� � � � � � � �  super speed, self powered, config 1, rev 1.00
� � � � � � � �  driver: uhub0
addr 02: 1bc7:1041 Telit Wireless Solutions, LM960A18
� � � � � � � �  super speed, power 224 mA, config 1, rev 3.18, iSerial
1378f76e
� � � � � � � �  driver: umb0
� � � � � � � �  driver: ugen2
addr 03: 8087:0a2a Intel, Bluetooth
� � � � � � � �  full speed, self powered, config 1, rev 0.01
� � � � � � � �  driver: ugen0
addr 04: 1357:1000 HL 0000 00 00 00 01, Smart Control
� � � � � � � �  full speed, power 200 mA, config 1, rev 1.00
� � � � � � � �  driver: uhidev0
� � � � � � � �  driver: uhidev1
� � � � � � � �  driver: uhidev2
addr 05: 0bda:0129 Generic, USB2.0-CRW
� � � � � � � �  high speed, power 500 mA, config 1, rev 39.60, iSerial
20100201396000000
� � � � � � � �  driver: ugen1

I supose the power for USB is poor 200 mA. In Windows is 895 mA.
I tried different USB adapter, instead of USB 3.1 adapter I used USB 2.0
adapter, without success. No progress, despite the power increased to 500
mA on USB 2.0 .


Thank you for any help and suggestions.


Kind Regards,
Arkadiusz Majewski