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A EN 12/28
1KHW001495-EN
C.11.4 Pax 2-wire
The following test must only be done, if the operation mode ‘Pax 2-wire’ is configured.
Get the equipment in local loop operation according to chapter C.1. Relevant AF measurements
cannot be achieved at the 2-wire interfaces in the local loop mode.
1. Check PAX-BLOCKING relay. In normal operation or local loop mode contacts at
terminal, telephony, 6b-7a should be closed and contacts at 6a-6b should be open.
Interrupt local loop according to chapter C.1, after the programmed delay time the link
alarm occurs. Now contacts at terminal, telephony, 6b-7a should be open and contacts
6a-6b should be closed.
2. Restore local loop.
C.11.5 Pax 4-wire
The following tests must only be done, if the operation mode ‘Pax 4-wire’ is configured.
Get the equipment in local loop operation according to chapter C.1.
1. Toggling the M-WIRE input, E-WIRE output should toggle simultaneously.
Note, E-WIRE is a switching contact without inherent voltage source and without polarity.
2. Activate M-WIRE. If M-WIRE is configured as ‘inverted’, contacts at terminal, telephony,
4a-4b must be opened, otherwise closed.
3. Feed a 800 Hz tone, with the configured input level into AF1-IN. Take a measurement of
the output level at AF1-OUT. It should be in 1 dB range of the configured output level.
4. Check PAX-BLOCKING relay. In normal operation contacts at terminal, telephony, 6b-7a
should be closed and contacts 6a-6b should be open.
Interrupt local loop according to chapter C.1, after the programmed delay time the link
alarm occurs. Now contacts at terminal, telephony, 6b-7a should be open and contacts at
6a-6b should be closed.
C.11.6 Pax 4/2-wire
The following tests must only be done, if the operation mode ‘Pax 4/2wire’ is configured. .
Get the equipment in local loop operation according to chapter C.1.
1. Toggling the M-WIRE input, E-WIRE output should toggle simultaneously.
Note, E-WIRE is a switching contact without inherent voltage source and without polarity.
2. Activate M-WIRE. If M-WIRE is configured as ‘inverted’, contacts at terminal, telephony,
4a-4b must be opened, otherwise closed.
Note: It is assumed, that LOCAL/TRANSIT is deactivated.
3. Feed a 800 Hz tone, with the configured input level into AF1-IN.
4. Take a measurement of the output level at AF1-OUT of the local equipment. It should be
in 1 dB range of the configured output level from the local equipment.
5. Take a measurement of the output level at P2W-OUT of the local equipment. It should be
in 1 dB range of the configured output level from the local equipment.
6. Activate LOCAL/TRANSIT equipment. If LOCAL/TRANSIT is configured as ‘inverted’,
contacts at terminal, telephony, 5a-4b must be opened, otherwise closed.
7. Feed again a 800 Hz tone, with the configured input level into AF1-IN.
8. Take a measurement of the output level at AF1-OUT of the local equipment. Level of
AF1-OUT should be 40 dB below of the configured output level from the local equipment.
9. Check PAX-BLOCKING relay. In normal operation contacts at terminal, telephony, 6b-7a
should be closed and contacts at 6a-6b should be open.
Interrupt local loop according to chapter C.1. after the programmed delay time the link
alarm occurs. Now contacts at terminal, telephony, 6b-7a should be open and contacts at
6a-6b should be closed.
C.11.7 Transit mode for E&M wire
The following tests must be done only, if the operation mode ‘Transit mode for E&M wire’ is
configured at the local equipment.
Get the equipment in local loop operation according to chapter C.1.
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