Problem on calling "local" numbers - does not pass validation

[sraps]

AMI connected normally, all dependencies satisfied
Scenario: calling local (inhouse) number from Customer contact's (res.partner) phone number, clicking on the tel link. Phone number is 6002. The number is perfectly recognized by Asterisk - call can be originated using Asterisk CLI and AMI. The call fails using asterisk_click2dial + base_phone

Fires such exception in Odoo 12 console...
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/http.py", line 654, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 312, in _handle_exception
raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 87, in reraise
raise value
File "/usr/lib/python3/dist-packages/odoo/http.py", line 696, in dispatch
result = self._call_function(**self.params)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 344, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 97, in wrapper
return f(dbname, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 337, in checked_call
result = self.endpoint(*a, **kw)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 939, in call
return self.method(*args, **kw)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 517, in response_wrap
response = f(*args, **kw)
File "/mnt/extra-addons/base_phone/controllers/main.py", line 14, in click2dial
click2dial_id=click2dial_id).click2dial(phone_number)
File "/mnt/extra-addons/asterisk_click2dial/models/phone_common.py", line 23, in click2dial
ast_number = self.convert_to_dial_number(erp_number)
File "/mnt/extra-addons/base_phone/models/phone_common.py", line 139, in convert_to_dial_number
parsed_num = phonenumbers.parse(erp_number, None)
File "/usr/local/lib/python3.5/dist-packages/phonenumbers/phonenumberutil.py", line 2812, in parse
"Missing or invalid default region.")
phonenumbers.phonenumberutil.NumberParseException: (0) Missing or invalid default region.

The same problem happens when directly parsing the phone number 6002 using phonenumbers library in python3 console:
a = phonenumbers.parse("6002", None)

File "/usr/local/lib/python3.5/dist-packages/phonenumbers/phonenumberutil.py", line 2812, in parse
"Missing or invalid default region.")
phonenumbers.phonenumberutil.NumberParseException: (0) Missing or invalid default region.

Possible solution: not to parse the phone numbers before dialing at all, as PBX's dialplan eg Asterisk is responsible for interpreting phone numbers.

[github-actions]

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