Network Matching And Gain Control Switches - Panasonic Digital Business System Installation Manual

March 1997

Network Matching And Gain Control Switches

The E&M card has
characteristics. There are 3 groupings.
SW105 , SW205 and SW305 which control the matching characteristics of the 1st , 2nd and 3rd circuits
respectively.
SW104 , SW204 and SW304 control the transmission gain for the 1st , 2nd and 3rd circuits respectively.
SW103 , SW203 and SW303 control the reception gain for the 1st , 2nd and 3rd circuits respectively.
These switches should normally be left in their preset positions since these have been chosen to suit the UK
network.
The following figure and tables show the location and effect of these switches.
Switches 105 to 305 have two positions A and B to match the following:
Switches 103 to 303 and 104 to 304 are four position DIP switches which all have following settings matrix
Switches should be left set to the OFF position. Any other setting may result in unstable cross connection and
Panasonic Digital Business System - Installation Manual
two sets of switches which control the set up of the card to compensate for circuit
Figure 27 - Location Of Matching Switches On The E&M Card
A 370+620/310
SW103~303 & SW104 ~ 304
1 2
OFF OFF
ON OFF
OFF ON
OFF OFF
OFF OFF
Table 9 - E&M Card DIP Switch Settings
invalidate the approval.
uF B
3 4 Gain Set
OFF OFF
OFF OFF
OFF OFF
ON OFF
OFF ON
Warning
34
300+1000/0.22 uF
+4 dB
0 dB
-2 dB
-4 dB
-6 dB
Issue 5