Accord XPC, Руководство по установке, Страница: 20 / 62

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• The SEN of the Accord xpC is 0.3.
• Nominal series resistance is 90 milli-ohms.
• Nominal insertion loss is 0.1 dB.
Note: Difficulties may be experienced when making calls from other apparatus if the
total
SEN
value approaches one or the total series resistance 50 ohms. If such
difficulties are experienced, please consult the Accord
XP
C installer or supplier,
not BT.
It is recommended that the PSTN should have the following facilities:
• Outgoing calls only (when used as dialler only).
• Direct exchange.
• Tone dialling.
Private Branch Exchange (PBX) Connection
The Accord xpC is only approved for use with BABT approved PBXs. The correct
operation of the Accord
XP
C can not be guaranteed under all possible conditions of
connection to compatible PBXs.
When connected to a PBX, the Accord xpC can be programmed to pause for two seconds,
between the dialling of the digits.
Final Mounting
Once all cable entries have been made to the enclosure and connected to the control panel
the enclosure should be firmly mounted in place using the two mounting holes at the
bottom of the control panel enclosure.
Securing and Removing the Enclosure Lid
To secure the lid in place:
1. Hold the lid at an angle of 90
o
to the enclosure base.
2. Place the eight (two groups of four) lid hinges into the lid hinge recesses on
the lip of the Accord xpC enclosure.
3. Swing the lid down such that the hinges swing into the holes in the top of
the enclosure rim and the lid fits snugly on top of the enclosure base.
4. Fix the lid in place by inserting and tightening the two M4×20 mm pan head
screws provided, into the screw holes in the bottom corners of the lid.
Note: To remove the lid, simply reverse the process.