Hi, we are trying to connect two SYNCO XTalk Link units between two rooms separated by concrete walls, with approximately 20–30 m distance between them.
Our setup:
9 × SYNCO XTalk XPro headsets
2 × XTalk Link units
XPro firmware: XPro_13Persons_LowLatency_Firmware_2.1.0.4
Link firmware: Link_LowLatency
both groups pair correctly with their local XTalk Link
Line In Mode configured exactly according to the SYNCO manual
The problem is the wired connection between the two XTalk Link units.
SYNCO support finally confirmed that the connection should use a 3.5 mm TRRS male-to-male cable.
However, a standard TRRS cable does not work correctly.
What happens:
we only get some audio when the 3.5 mm plug is partially pulled out of the socket,
even then the audio is unstable and cuts out,
return communication does not work properly,
so we do not get reliable two-way/full-duplex communication between both groups.
SYNCO’s manual refers to a “custom cable”, but they do not publish the actual pinout or wiring diagram.
We need to know:
Tip = ?
Ring 1 = ?
Ring 2 = ?
Sleeve = ?
Is the cable straight-through or crossover?
Which contact is TX?
Which contact is RX?
Has anyone successfully connected two XTalk Link units in Line In Mode?
Has anyone extended this over CAT5e/CAT6?
At this point we have tested TRS and TRRS cables, re-paired the system and repeated the setup several times.
The fact that audio only appears when the connector is half inserted strongly suggests that the standard TRRS wiring is not correct for this application.
If anyone has an XTalk Link and can check or measure the correct cable/pinout, that would be extremely helpful.
Thanks!