chan_mobile.conf

# Call output
    -- Mobile/nexus-759f is making progress passing it to IAX2/user-14872
    -- Mobile/nexus-759f is ringing
    -- Mobile/nexus-759f answered IAX2/user-14872
    -- Channel Mobile/nexus-759f joined 'simple_bridge' basic-bridge <09787e7f-d92a-424a-b4c1-c34f5d8d2105>
    -- Channel IAX2/user-14872 joined 'simple_bridge' basic-bridge <09787e7f-d92a-424a-b4c1-c34f5d8d2105>
[Oct 23 10:24:27] WARNING[3705]: chan_iax2.c:3572 __attempt_transmit: Max retries exceeded to host 127.0.0.1 on IAX2/user-14872 (type = 6, subclass = 11, ts=10002, seqno=6)
    -- Channel IAX2/user-14872 left 'simple_bridge' basic-bridge <09787e7f-d92a-424a-b4c1-c34f5d8d2105>
  == Spawn extension (default, 12062960108, 1) exited non-zero on 'IAX2/user-14872'
    -- Hungup 'IAX2/user-14872'
    -- Channel Mobile/nexus-759f left 'simple_bridge' basic-bridge <09787e7f-d92a-424a-b4c1-c34f5d8d2105>

# chan_mobile.conf
[adapter]
address = 5C:F3:70:7A:ED:88
id = dongle

[nexus]
address = 88:07:4B:1C:C3:70
context = default
port = 3
adapter = dongle