
NT5D97 Dual-port DTI2/PRI2 card
Page 343 of 906
Circuit Card
Description and Installation
Trunk interface switches for NT5D97AA/AB
Impedance level and unit mode
The S9/S15 switch selects the impedance level and loop operation mode on
DEI2 OR PRI2. Refer to Table 122.
Transmission mode
A per-trunk switch (S4/S10) provides selection of the digital trunk interface
type. Refer to Table 123.
Line build out
A per-trunk set of three switches (S5/S11, S6/S12 and S7/S13) provides the
dB value for the line build out. Refer to Table 124 on
page 344
.
Table 122
Impedance level and loop mode switch settings
Switch
Description
S9/S15 Switch Setting
1
Impedance level
OFF - 120 ohm
ON - 75 ohm
2
Spare
X
3
Spare
X
4
Unit mode
OFF - Loop operates in the DTI2 mode
ON - Loop operates in the PRI2 mode
Table 123
Impedance level and loop mode switch settings
Description
S4/S10 switch settings
E1
OFF
Not used
Summary of Contents for Circuit Card
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Page 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
Page 18: ...Page 18 of 906 Contents 553 3001 211 Standard 3 00 August 2005...
Page 78: ...Page 78 of 906 Overview 553 3001 211 Standard 3 00 August 2005...
Page 100: ...Page 100 of 906 Acceptance tests 553 3001 211 Standard 3 00 August 2005...
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