Hi there. We have a P570 with 2x EX08 Expansion Board, each with 2x O2 Dual FXO ports Module and 2x GSM Module Single Channel, for a total of 8 PSTN lines and 4 GSM trunks.
Outgoing calls are working, ext to ext are ok, call forwarding to outbound route works fine. IVR is set up, with routes to ivr menus, extensions and ring groups.
Am currently testing with 1 gsm trunk and 1 pstn line connected. When calling from a landline to both pstn and gsm trunk, all woks fine: can select ivr selections or dial extension. When calling from gsm to pstn trunk, everything works fine also. But when calling from a mobile phone (tested with a Samsung Galaxy S10e and S10 Lite with 2 different providers) to the gsm trunk, key presses are not recognized.
Rx and Tx volmues are tested at 40, 80 and 100% both and echo cancellation on and off. FXO Mode is set at FCC and Tone Region was tested with USA, USA 1950, Brazil, China. All the same result with (not tested with PSTN, only mobile phone). Virtual RingBack Tone is selected. DTMF Duration and Gap are tested with 100, 110, 120, 130 and 300ms. DTMF passthrough tested with and without.
With our Elastix, we are using a GSM Gateway (Portech MV-372) with the DTMF Duration set on Unlimited and Debounce is set at 1000ms and it works good there. But this is not available on the GSM trunk settings on the P570.
What more should I check?
2 comments
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Oscar Colka As my past experience, some of the GSM provide would not foward the DTMF tones to a GSM number. To make sure whether the GSM provider forward the DTMF or not:
1. Check with the GSM provider
2. Try pull out the GSM SIM card and insert into a mobile phone, make a phone call to the GSM number and press keys, check if you can hear the DTMF tones
3. Follow below guide to check if there is any DTMF tones received:
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Winston Chung Hi Oscar,
Thank you for your input. Have sent the files to Yeastar Technical Support. After analyzing they said that the tone is there, but very weak.
Have added a second sim from another provider, and calling to that one works right away.
Have swapped the 2 sims from slot, problem follows the 1 sim. Have contacted the provider already, but they denied that anything was blocked. Issue is only with gsm-to-gsm calling to provider #1. Calling to gsm#2 works fine, from both providers.
Am now waiting for Yeastar Tech to send a solution. Need to go live with the PBX, so will do without gsm #1 trunk.