E1/T1 PCI card installation guide
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Earthing/Grounding of Input and Output Ports on 75 Ohm card
Jumpers are provided on revision 1.2 PM modules to enable the outer conductor of the ports to
be connected to the functional earth/ground. If these jumpers are not fitted, the outer conductor
is isolated from ground.
The output port jumpers are J10 for port 0, J5 for port 1, J8 for port 2 and J7 for port 3.
The input port jumpers are J6 for port 0, J9 for port 1, J4 for port 2 and J3 for port 3.
These jumpers are fitted as default, and may only be reconfigured following agreement with the
PTO.
Refer to section 2.4 for details on the location of these jumpers.
Network Connection via Other Apparatus
If other apparatus, including cable or wiring, is to be connected between the E1 card and the
point of connection to the network, then all of that apparatus must comply with the following:
•
The overall transmission characteristic of all the other apparatus, upon electrical conditions
presented to one another by the apparatus and the network connection, shall be such as to
introduce degradation no greater than the requirement for direct connection. The
attenuation shall be assumed to follow the
√
f law, and the loss at a frequency of 1024KHz
shall not exceed 6dB.
•
All that other apparatus shall comprise only apparatus approved for the purpose of
connection between the apparatus and the network. Cable, wire and wiring accessories
shall comply with Approval No: NS/G/1235/M/100009 Section 22, Telecommunications
Act 1984 Approval of cable, wire and wiring accessories for connection between certain
digital telecommunication apparatus, published by OFTEL.
The installation should comply with the Wiring Code Part 2, published by OFTEL.
The MEF Watchdog
Once running, the DASS-2 port processors enable an internal 'watchdog' timer that they must
persistently and regularly update. Any error condition that causes processing to falter will cause
the watchdog to generate a processor reset. This is the 'Major Equipment Failure' (MEF)
condition, and will result in a 'no signal' being presented at the particular G703 output port,
which is the required behaviour under these conditions.
Service Requirements
In case of equipment malfunction, repairs should be carried out by Aculab plc. It is the
responsibility of users requiring service to report the need for service to our company.
Contact details are available from the Aculab company web site at
http://www.aculab.com
.
EN55022 declaration
This is a class A product. In a domestic environment, this product may cause radio interference
in which case the user may be required to take adequate measures.
No changes or modification to the E1/T1 PCI card are allowed without explicit written
permission from Aculab, as these could void the end user's authority to operate the device.