# Not getting port(USB) for EM7455 modem **URL:** \ **Category:** MC/EM Series\ **Created:** [November 24, 2024, 10:58pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049 "2024-11-24T22:58:57Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![nasirmbutt](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@nasirmbutt](https://forum.sierrawireless.com/u/nasirmbutt)\ **Post date:** [November 24, 2024, 10:58pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/1 "2024-11-24T22:58:57Z")
i flashed the firmware to latest and still cant get the usb(com) for the modem here are all the command i tested can you please help me i am using windows 10 and Sierra ME7455? Send:AT Recieve: AT Recieve: OK Send:ATI Recieve: ATI Recieve: Manufacturer: Sierra Wireless, Incorporated Recieve: Model: EM7455B Recieve: Revision: SWI9X30C\_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 20:59:30 Recieve: MEID: 35344908075109 Recieve: IMEI: 353449080751094 Recieve: IMEI SV: 20 Recieve: FSN: LF115174840110 Recieve: +GCAP: +CGSM Recieve: OK Send:ATI3 Recieve: ATI3 Recieve: Manufacturer: Sierra Wireless, Incorporated Recieve: Model: EM7455B Recieve: Revision: SWI9X30C\_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 20:59:30 Recieve: MEID: 35344908075109 Recieve: IMEI: 353449080751094 Recieve: IMEI SV: 20 Recieve: FSN: LF115174840110 Recieve: +GCAP: +CGSM Recieve: OK Send:AT!ENTERCND=“A710” Recieve: AT!ENTERCND=“A710” Recieve: OK Send:AT!IMPREF? Recieve: AT!IMPREF? Recieve: !IMPREF: Recieve: preferred fw version: 02.33.03.00 Recieve: preferred carrier name: GENERIC Recieve: preferred config name: GENERIC\_002.072\_000 Recieve: preferred subpri index: 000 Recieve: current fw version: 02.33.03.00 Recieve: current carrier name: GENERIC Recieve: current config name: GENERIC\_002.072\_000 Recieve: current subpri index: 000 Recieve: OK Send:AT!USBCOMP? Recieve: AT!USBCOMP? Recieve: Config Index: 1 Recieve: Config Type: 1 (Generic) Recieve: Interface bitmask: 00001009 (diag,modem,mbim) Recieve: OK Send:AT!PRID? Recieve: AT!PRID? Recieve: ERROR Send:AT!PRIID? Recieve: AT!PRIID? Recieve: PRI Part Number: 9909767 Recieve: Revision: 001.000 Recieve: Customer: Generic-M2M Recieve: Carrier PRI: 9999999\_9904609\_SWI9X30C\_02.33.03.00\_00\_GENERIC\_002.072\_000 Recieve: Carrier PRI: 9999999\_9904594\_SWI9X30C\_02.32.11.00\_00\_ATT\_002.070\_000 Recieve: Carrier PRI: 9999999\_9904779\_SWI9X30C\_02.32.11.00\_00\_SPRINT\_002.062\_000 Recieve: Carrier PRI: 9999999\_9904780\_SWI9X30C\_02.33.03.00\_00\_VERIZON\_002.079\_001 Recieve: OK Send:AT!USBINFO? Recieve: AT!USBINFO? Recieve: VID: 0x1199 Recieve: APP PID: 0x9071 Recieve: BOOT PID: 0x9070 Recieve: Manufacturer: Sierra Wireless, Incorporated Recieve: Product: Sierra Wireless EM7455B Qualcomm?? Snapdragon??? X7 LTE-A Recieve: OK Send:AT!USBPID? Recieve: AT!USBPID? Recieve: !USBPID: Recieve: APP : 9071 Recieve: BOOT: 9070 Recieve: OK ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [November 25, 2024, 1:34am UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/2 "2024-11-25T01:34:23Z")
> [@nasirmbutt](#): > > still cant get the usb(com) for the modem What do you mean? didn’t you already have the AT command port now? ---
**Author:** ![nasirmbutt](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@nasirmbutt](https://forum.sierrawireless.com/u/nasirmbutt)\ **Post date:** [November 26, 2024, 12:50pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/3 "2024-11-26T12:50:15Z")
there is no com port for the modem in the ports section in device manager , i am trying to find the port in the windows application which no luck? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [November 26, 2024, 2:11pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/4 "2024-11-26T14:11:40Z")
If there is no port, how did you enter AT command above? ---
**Author:** ![nasirmbutt](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@nasirmbutt](https://forum.sierrawireless.com/u/nasirmbutt)\ **Post date:** [November 26, 2024, 5:32pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/5 "2024-11-26T17:32:05Z")
I am new in the c# development, under ports i only have DM port COM6 and NME Port COM6 nothing for modem. Modem is showing in modem section but not showing in port section. I used at commands directly form the modem with Huawei terminal modem? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [November 26, 2024, 5:41pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/6 "2024-11-26T17:41:23Z")
you don’t need to care about modem section or port section. You just need to open the correct COM port for AT command communication ---
**Author:** ![nasirmbutt](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@nasirmbutt](https://forum.sierrawireless.com/u/nasirmbutt)\ **Post date:** [November 26, 2024, 8:26pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/7 "2024-11-26T20:26:38Z")
If I forget the modem how do i find out which com is for AT command? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [November 27, 2024, 1:09am UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/8 "2024-11-27T01:09:47Z")
you can try all the COM port to send “AT” and see which one has OK response ---
**Author:** ![nasirmbutt](https://avatars.discourse-cdn.com/v4/letter/n/58f4c7/32.png) [@nasirmbutt](https://forum.sierrawireless.com/u/nasirmbutt)\ **Post date:** [November 29, 2024, 11:12pm UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/9 "2024-11-29T23:12:06Z")
What is the AT command to change EM7455 mode to NMEA, AT. I only need two of them? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [November 30, 2024, 1:46am UTC](https://forum.sierrawireless.com/t/not-getting-port-usb-for-em7455-modem/34049/10 "2024-11-30T01:46:04Z")
You can try ```auto AT!entercnd="A710" aT!USBCOMP=? At!usbcomp? ``` But i remember DM port cannot be disabled