Kuhnt AS55 Series, Руководство по обслуживанию

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SERVICE MANUAL AS55X
55Xseries_manual_V3.22 (18-08-15) www.kuhnt.com 13
1.14 PassThrough backup mode
All calls shall be routed via GSM if the connection to fixed network is completely lost or if the
network cannot route the calls due to congestion or resource problems.
If “PassThrough backup” is activated a call proceeding tone or announcement will be heard if
a PassThrough backup call is in progress.
Please keep in mind, that the call-setup time is longer in this case as the AS55X BRI tries to
forward the call to the fixed network first. It checks via timer if all dialled digits did arrive and
finally it starts the call via GSM.
It is strongly recommended to check, if this audio signal can be heard by the calling user in
the case of a backup call as he should have knowledge about this special (and normally more
expensive) routing.
For programming instructions see 5.11.7
1.15 ProviderSimSwitch
The feature is only available for devices with the SimSwitch hardware
With powering up the WLL 550 Pro the “ProviderSimSwitch“ starts testing the GSM
networks by two criteria. First is the speed of the internet connection (UMTS, GPRS or no
access). Second is the signal quality of the GSM network. If a full working network is
detected (100% signal quality and full UMTS service) any further testing will be stopped
immediately. The search will be repeated until a working GSM network is found.
The time out for each SIM card logging into a GSM network is 45 seconds after the restart of
the GSM module. For testing the APN setup there is an additional period of 30 seconds to
connect to the internet.
Finally the “ProviderSimSwitch“ will remain at the SIM with the best available network. If a
network connection is lost for more than 10 seconds or if a new search is triggered
manually, the network search will restart considering the previous network data.
For programming instructions see 5.11.8