Phone Systems

Previous Thread
Next Thread
Print Thread
Rate Thread
#640469 03/23/21 09:21 AM
Joined: Feb 2019
Posts: 22
MJonas Offline OP
OP Offline
Joined: Feb 2019
Posts: 22
We are using SIP Carrier for ourside line that supports FAX T.38 option.
The FAX T.38 option is activated per standard in officeserv and MGI/OAS Card.

We tried to send several faxes but it does not work very well. I don't know if Officeserve is using the T.38 standard.

The question is: how does officeserv know that we are sending a fax or when to switch over to T.38. I didn't find any setting.

Thank you


Advertising Sponsor
MJonas #640471 03/23/21 07:50 PM
Joined: Jun 2006
Posts: 2,866
Joined: Jun 2006
Posts: 2,866
The system and your sip provider should auto negotiate t.38 when they detect fax tones.
You may need to use g711 for your codec rather than g729

Fax over ip I found to be unreliable. We always converted them to vfax (email based send/receive) if the carrier supported it.

Moderated by  Genesiscomm, nameless, pvj 

Link Copied to Clipboard
Most Recent 5 Post
CIX40 A3 AC power supply
by newtecky - 04/14/21 10:34 PM
samsung Officeserver 100
by bditech - 04/14/21 07:41 PM
by Carl Navarro - 04/14/21 12:37 PM
off premise help
by dougster - 04/13/21 05:10 PM
Comdial DXP Call flows
by Rocket J Tech - 04/12/21 02:59 PM
Popular Topics (Views)
Forum Statistics
Most Online5,661
May 23rd, 2018
Today's Birthdays
Nevyn, Redryder2448
Newest Members
Rocket J Tech, Jonce, Generoso, Flashy65, dv8inpp
49,445 Registered Users
Get Tech Support Now! Click the banner below
Get Tech Support Now!
EMP & Lightning Home Surge Protection
EMP - Click Here!
Top Posters (30 Days)
dexman 62
Ruben 14
jsaad 7
Linked Banner to your Product or Website
EMP Shield for Commercial - Home & Vehicle
Use Coupon code SAVE - Click Here!
Who's Online Now
35 members (dougster, newtecky, dexman, Bushmills, RATHER BE FISHING, BobRobert, justbill, Curlycord, tgullett, mongo5150, Scotty Woods, pvj, nortelvoip, bditech, Carl Navarro, dans, bdunne, Biztel Cuban Okie Tech, nfcphoneman, Ruben, Touch Tone Tommy, sketchypro, sundance, Yoda, JBean3329, Nate Ronning, Daniel, Professor Shadow, KRRath, gelehu, vicbob, Gary S., R4+Z, MooreTel, metelcom), 550 guests, and 93 robots.
Key: Admin, Global Mod, Mod
Advertising Sponsor Spot 2
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2021
Trusted Partners