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PRI
termination
PRI haul mode
Sa5 bits
ARGUS PRI
Depending on the transmission technique (75 Ohm coaxial-cable or
twisted-pair cable with an impedance of 120 Ohms) used, the PRI
termination resistor must be selected accordingly.
The default setting is country-specific and corresponds to the
system most common in the respective country:
Germany, Austria, England, the Netherlands, France: 120 Ohm
Spain, Italy, Greece: 75 Ohm
The ARGUS can set the sensitivity on a PRI access.
By default, "short haul" will be suggested.
short haul:
long haul:
When using greater sensitivity ("long haul" mode) on longer lines,
feedback on the line can cause faulty synchronisation.
The ARGUS can set the Sa5 bits on a PRI access. By default, the
Sa5 bits are set to 0000.
The Sa5 bits have no significance between an NTPM and
a PBX system.
This setting will not be saved permanently, rather only applies for
the current measurement.
Sa5 coding
Meaning
0000
Network -> Terminal
1111
Direction code
------------------------
4 Operation on a PRI Access
Normal sensitivity, i.e. signal reception with
cable attenuation of up to ca. -10 dB.
Increased sensitivity, i.e. signal reception with
cable attenuation of up to ca. -35 dB. This
corresponds to a distance of 1600 m with 22
AWG twisted pair cable.
Meaning
Terminal -> Network
Ack. for loop command
Direction code
21
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