codec preference

  1. Three different places to set codec priority?

    I am trying to see if there is anything I can do to improve call audio quality which has lead me to checking codec priorities. I have read through Which Codecs does 3CX support and when? and have a rough understanding of how codec priorities work. If I understand correctly there is a matching...
    • ASTERHC
    • Thread
    • audio codecs codec codec preference codec priority codecs codecs extensions
    • Replies: 14
    • Forum: Phone System / PBX
  2. KoesioOccitanieTech

    Codec gestion like ip phone for DECT ?

    Hello, We are able to change codecs order on IP phone but when it comes to DECT, we don't have the choice, i'm pretty sure it was the case in V18. I'm in Europe and PCMA is largely used here and my W90B use PCMU by default. If we can avoid any transcoding it will be nice to have the choice...

  3. Solved Fanvil X3U and X4U: Codec priority not saved

    Hi I'm not certain if this is an issue specific to these Fanvil phones, however being on v18 Update 3 + Hostfix we had to create new phone accounts and while provisioning the connected 3CX phones I realized that changes in the Codec preference were not saved on the PBX. When I reload the page...
    • gnsim
    • Thread
    • codec preference
    • Replies: 3
    • Forum: Fanvil

  4. Solved 3cx keeps sending PCMU to Grandstream GXW4104

    Hello, We have provisioned a Grandstream GXW4104 to our 3cx running Professional Annual 16.0.8.9. The customer complains that they have no outgoing audio in outbound calls, while inbound calls work with 2 way audio. I noticed that 3cx keeps sending PCMU to the GXW4104, instead of PCMA which has...
  5. SteveITS

    Solved Codec order in v18

    For the two options: Codec order for LAN connected devices or Apps connected to WiFi Codec order for WAN connected devices or Apps connected to LTE/3G If 3CX is hosted online in a data center and not in the office... Is the Desktop App/web client/Windows client considered WAN? (let's assume...

  6. Poor FXS support for FAX in 3cx, provisioning Grandstream ht802 leaves much to be desired

    3cx version: 16.0.3.676 on premise in a hyper-v vm FXS Grandstream ht802 firmware: 1.0.13.7 Provider: deutsche telekom, sip-trunk ngn FXS resides in the same local subnet as the 3cx server Goals: Use codecs G722, ALAW, ULAW, G729 in this order for voice extensions internally and externally...

  7. Disable Transcoding

    If an HD codec is used for internal calls (Opus, G722) and for the provider e.g. only G711 is available, is automatically transcoded at "PBX Delivers Audio active" and the voice quality is severely impaired. In some VPN scenarios it is better if "PBX Delivers Audio" is enabled on the Sip trunk...
    • moritz
    • Thread
    • codec codec preference codec priority g.711 mediaserver g.722 opus transcoding
    • Replies: 5
    • Forum: Server

  8. 3CX muffled voice

    Good morning, everyone, I come to this forum, because I have a small problem with the voice quality on 3CX. All incoming and outgoing calls are muffled. Even IVR and voicemail seem to be muffled. I made some changes to the codecs, but still nothing... the quality is the same. In the 3CX logs, I...

  9. Opus Codec Constant Bitrate Support

    Is there an option to set a constant bitrate for OPUS? It seems that the only option currently available, is variable. Thanks

  10. Trying to figure out codec usage

    I'm slightly confused by a few settings regarding codec usage. Here is my scenario: 1 office 1 PBX in the cloud 10 Users => 20 Endpoints of which 10 3CX windows clients and 10 mobile 3CX clients. Q1. When defining an extension, I supply provisioning rules with a specific codec order. I...

  11. 15.5SP6: Codec priority in PBX settings?

    There is a (for me) new setting in the PBX preferences: Codec priority for Calls: Default Values: Internal/Local: PCMU PCMA G722 GSM G729 OPUS External Calls: GSM G729 G722 PCMU PCMA OPUS I can guess what internal call are, but "local"? Also I guess most calls are External calls, but then the...
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