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Francesco Zangara 3 months ago in Products / Other drivers • updated by Dmitry - support (expert) 3 days ago 9

Sometimes, when I press on answer button, the driver not send the answer command.

For test I use:

- Fastell analog doorcom

- Analog telephone

- VoIP telephone

- Yeastar MyPBX SOHO with 2 FXS

- Yealink T42 VoIP telephone

- Siemens Gigaset Maxwell VoIP telephone

- iPad (iOS 10.3.1) with i3Pro (1.1.5:12117)

- LG-H500 (Android 6.0) with i3Pro (1.1.4:11977)

- PC (Windows 10 Pro x64) with Emulator (1.1.4:12002) and Studio (1.1.4:19408)

All i3Pro have same project( https://s3.amazonaws.com/iridiumdeveloperdoc/SIP/_SIP+%5BSimple+Intercom%5D+tablet%2C+PC.irpz ), I simple change IP and ID+password for each device

When I call a ring group from Fastell, all device ringing (correct) and when I press the answer button, the communication is established. But sometime i3Pro not send the answer command (see log), so i3Pro where i press the button, switch to "talking page" but not open the communication and other device still ringing. In this case i need close communication from hangup button on i3Pro, otherwise the next call will not ring the devices.

***i3Pro Log from emulator (wrong answer)***

[08-05-2017 12:40:27.821] WARNING DEVICE Recieved Host:, External Host:, External IP:
[08-05-2017 12:40:27.836] WARNING DEVICE !!! Direct Connection via server !!!
[08-05-2017 12:40:32.582] INFO SOUND_RES Set codec type payload 3

***i3Pro Log from emulator (work answer)***

[08-05-2017 12:40:54.882] WARNING DEVICE Recieved Host:, External Host:, External IP:
[08-05-2017 12:40:54.902] WARNING DEVICE !!! Direct Connection via server !!!
[08-05-2017 12:40:57.093] INFO SOUND_RES Set codec type payload 3
[08-05-2017 12:40:57.196] WARNING DEVICE In <Invite Talk> state. ACK. Media Delayed Flag = 0 .All OK... in <Invite OK> Code: 904 102 ACK

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Could you take a snapshot of the network and during the recording of this snapshot try to repeat the error that you described? You can take a snapshot using Wireshark. Send this snapshot to us.

Could you make a more complete snapshot in which you can see what sends Iridium and what sends the SIP server to Iridium ?

SIP protocol device control I have been tested here, no problem.

Sorry Dmitry,

i have filtered packet with "ip.src==||ip.dst==" so in this file i captured all packet form and to pbx. is ip of pc with emulator (where i install wireshark).

More, i see all packet (w/o filter) and i not see packet from




Unfortunately, the new files are also not complete. In these files, we can see the sending of packets only to one side. But there are no answers from the second device. Please, send us the full snapshots without filters.

Hi Dmitry,




Now i create an dedicated LAN for test and i not use filter during capture.

I try with:

- i3Pro 1.1.7 emulator with your SIP.irpz (Tablet)

- PBX: myPBX soho with 3 FXS and 1 FXO

- Analog phone connected on FXS port

- Simple 5-Port Switch to connect PC and PBX

i3Pro and Wireshark are run on same PC

Hi Dmitry,

have you a news?


Sorry for delay with answer. Yes, in your snaps we see that there is some inaccuracy in the packets. But in order to understand the exact cause, we need to check this situation in our office. And if it repeats, we will try to fix it.

Unfortunately, we do not have the specified PBX server. Therefore, it will be difficult to repeat the problem.

Could you provide us with remote access to your PBX server?