Dialling failing with PPP timeout

[Rick Jones <rick activeservice co uk>]

I get persistent failure to connect with Mobile Broadband, and this seems to be a PPP timeout. Usually after a few retries it will work, and I suspect NM is timing out too soon, and not giving PPP time to get connected.

Typical failure case in daemon.log is:

Jun 18 16:28:54  <info>  (ttyUSB2): device state change: 5 -> 6 
Jun 18 16:28:54  <info>  (ttyUSB2): device state change: 6 -> 7 
Jun 18 16:29:08  <WARN>  pppd_timed_out(): Looks like pppd didn't initialize our dbus module 
Jun 18 16:29:08  <info>  (ttyUSB2): device state change: 7 -> 9 

The timeout is 15 secs. Sometimes a good connection can take nearly this long, so I think if there were more time there would be fewer failures.

Where is this timeout set? Is it in pppd - if so is there a setting in /etc/ppp/options to tweak it - or is it set by NM? I'd really llike to be able to try increasing this.

Log of a successful connection, for completeness:

Jun 18 15:40:52  <info>  (ttyUSB2): device state change: 5 -> 6 
Jun 18 15:40:52  <info>  (ttyUSB2): device state change: 6 -> 7 
Jun 18 15:40:53  <info>  PPP manager(IP Config Get) reply received. 
Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 4 of 5 (IP Configure Get) scheduled... 
Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 4 of 5 (IP Configure Get) started... 
Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 5 of 5 (IP Configure Commit) scheduled... 
Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 4 of 5 (IP Configure Get) complete. 
Jun 18 15:40:53  <info>  Activation (ttyUSB2) Stage 5 of 5 (IP Configure Commit) started... 
Jun 18 15:40:54  <info>  (ttyUSB2): device state change: 7 -> 8 

Thanks
Rick Jones