Ambit U10C034, Руководство пользователя

Страница: 40 / 90

U10C034 Telephony Version v1.4 June 2008
40
emtaSignalingPowerRingFrequency
(1.3.6.1.4.1.4413.2.2.2.1.6.4.18.0 Integer32)
This object must only be provided via the configuration file during the
provisioning process. The power ring frequency is the frequency at which
the sinusoidal voltage must travel down the twisted pair to make terminal
equipment ring. Different countries define different electrical
characteristics to make terminal equipment ring.
‧
f20Hz(1)
‧
f25Hz(2)
‧
f33Point33Hz(3)
‧
f50Hz(4)
‧
f15Hz(5)
‧
f16Hz(6)
‧
f22Hz(7)
‧
f23Hz(8)
‧
f45Hz(9)
‧
f17Hz(10)
emtaSignalingRingWaveform
(1.3.6.1.4.1.4413.2.2.2.1.6.4.20.0 Integer32)
This MIB object is controls the shape of the ring waveform. The setting
of sinusoidal(1) would result in a sinusoidal ring waveform with crest
factor of 1.414, while the setting of trapezoidal(2) would result in a
trapezoidal ring waveform with crest factor of 1.25.
‧
Sinusoidal(1)
‧
Trapezoidal(2)
2.2.9 Telephony Port Diagnostics
TPD testing can be used to diagnose problems with customer cabling,
terminations and unexpected foreign voltages sources. Testing encompasses the
ability to detect the hook state, the ability to communicate with a CMS, detect
shorts, opens and foreign voltages. Sense inputs connected directly to tip and
ring are provided to the eMTA for direct access to the telephony interface. The
pin of the SLIC which gives a voltage representation of the loop current also has
a sense input. These inputs allow TPD tests to be performed in order to fully
diagnose the loop condition. The resources in the codec and SLIC are available
to perform loop diagnostics (i.e. be able to stimulate and measure the loop).
The different telephony test available and their explanation consist of the
following:
Hazardous Potential Test