Choosing the Modem

Hardware Librem 5
26

I asked Mladen Pejakovic, Support Manager at Purism, about an alternative spec sheet for the BM818-A1 modem, since the only one I could locate online at the BroadMobi website does not include VoLTE on the “enhanced features” list, as many posters on this Forum have pointed out, and various content on the Forum and Wiki FAQ has declared that the BM818-A1 “does not support VoLTE”.
[http://www.broadmobi.com/en/module_show.php?id=18]

In response, Mladen sent me a PDF of a spec sheet brochure for the BM818-A1 on 02/01/21, though he didn’t provide a link or cite the source, though presumably it was sent from BroadMobi. This Forum won’t allow the upload of PDF files. But, copy & pasted from the brochure, which seems to include support for VoLTE:

General Features
• Variant:
FDD-LTE
B2/B3/B4/B5/B12/B13/B17/B25/B26/B66
TDD-LTE B41(200M)
HSPA+/WCDMA B2/B4/B5
GSM/GPRS/EDGE B2/B5
• 3GPP Rel. 10
• Supply voltage range: 3.3V~ 4.2V
• Operation temperature: -40℃ to +85℃
• Dimension: 42.030.02.3mm
• Weight: 6.5g
• M.2
• Voice
Speech codec(HR,FR,EFR,AMR,AMR-WB)
Echo Cancellation, Noise Reduction
VoLTE, Digital Audio and VoLTE
• SMS
Point-to-Point MO and MT
SMS cell Broadcast
Text and PDU Mode
• Control Via AT Commands

Software Feature
• USB Driver for Windows 7/8/10, Linux
• PC Suite for Windows OS
• NDIS Driver for Linux
• ECM Driver for Linux
• Gobinet Driver for Linux
• RIL supporting for Android
• Protocols
TCP/UDP/PPP/FTP/HTTP/SMTP/SSL/POP3/DN
S/MMS

Enhanced Features
• FOTA;
• DoubleProtect-backup for Software and APP
• Temperature Management;
• GNSS: GPS,GLONASS,BeiDou,Galileo;

Data
•LTE CAT.4

  • Uplink up to 50Mbps,
  • Downlink up to 150Mbps
    • HSPA+
  • Uplink up to 5.76 Mbps,
  • Downlink up to 42 Mbps
    • UMTS
  • Uplink/Downlink up to 384Kbps
    • CDMA 1x EV-DO
  • Max. 14.7Mbps(DL), Max. 5.4Mbps(UL)
    • EDGE
  • Max. 236.8Kbps(DL),Max. 236.8Kbps(UL)
    • GPRS
  • Max. 85.6Kbps(DL), Max. 85.6Kbps(UL)

Shanghai BroadMobi Communication Technology Co., Ltd Http://www.broadmobi.com
Floor15, Building9, No.99, Tianzhou Rd, Shanghai, P.R.China
Tel:+86-21-60913308 Fax: +86-21-60913308-818 Email:Fae@broadmobi.com

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