Router/Network configuration: Obi202 and Sprint Airave on same subnet

[BGood]

In our home network we have a Sprint Airave which has historically been required to improve CDMA cell signal, and a recently-installed Obi202 with two phone lines (RingTo, Google Voice) and Anveo E911 service.

The installation guide for the Sprint Airave insists that it should be placed between the cable modem (SB6141) and router (Sonicwall TZ170), but I think that this configuration interferes with network performance and Obi202 registration and voice traffic.  I find that the Airave works better behind the main router.

I am currently experimenting with isolating VOIP traffic on the Sonicwall's OPT port, and placing the Airave behind the Obi202 (on its LAN port) and administering bandwidth management, access, and QoS rules for both VOIP devices through the Sonicwall's firmware.

1) Has anyone configured these two devices this way?
2) Does anyone have a guide for defining an appropriate access rule for the Sonicwall enhanced o/s to administer this configuration?
3) How should the internal router in the Obi202 be configured for this arrangement?

Thanks for any help.

[SteveInWA]

We've already wasted enough time with your decade-old, seriously obsolete junk.

See: 
http://bfy.tw/3TF2

[SteveInWA]

Anticipating your future questions, OBi devices are not compatible with the following IT equipment:

• Teletype machines and their yellow paper tape readers/punches
• VT-100 terminals
• DECtape
• Army field telephones
• Navy semaphore flags
• Morse code
• Cassette and 8-track tape equipment
• S-100 bus equipment
• Citizen’s Band radios
• Hayes, Zoom or US Robotics modems
• Bisync, SDLC or frame-relay network devices
• ISDN telephones
• Progresso soup-can and string telephones
• AMPS mobile phone equipment
• Anything that uses vacuum tubes, nixie tubes, Ted Stevens' "Series of tubes", or anything listed in the song "What do you want from life" by The Tubes
• CALCOMP pen plotters
• All computing equipment from Amdahl, Burroughs, Cray, Sperry Univac, Unisys or Storage Tek
• The following IBM equipment:
  
  • Hollerith punched card equipment
  • 3330 disk packs
  • 5-¼ inch diskette equipment
  • 3420 tape reels
  • 3480 tape cartridges
  • 3270 terminal equipment
  • 3850 Mass Storage System
  • 3886 OCR readers
  • All Selectric equipment
  • System/36 or System/38 or Series/1 equipment
  • AS/400 equipment
  • System/360 -- 390 equipment
  • Bus and Tag cables
  • Token Ring and SNA networking equipment
  • Watson

• Anything "As Seen On TV", with the possible exception of magicJack
• Your Studebaker, Nash, Edsel, AMC and DeSoto automobiles
• Everything else in your basement junk collection