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Analog Voice ModulesPassport 4400 Hardware Installation Manual
6-18
Figure 6-20. Location of Straps, E&M Interface Module
E16 Used to shut out the series resistor in the SB lead in case the
loop resistance is too high to trip the detector inside the interface
module. If cabling is short, try with the strap removed.
E18 and E19 Reserved for factory use only. They must not be altered by the
user.
E20, E21, and E22 Spares.
Strap Number Description
E1 through E5 Reserved for factory use only. They must not be altered by the
user.
E17
C38
S/N
TYPE II
C38
C36
E15
E20
E21
E22
TYPE I
TYPE V
E5E4E3
E2
E1
E18
E8
E19
E9
E10
E11
E6
E7
E12
E13
E16
E14
Jumper in (default)
Jumper out