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SpecificationsPassport 4400 Hardware Installation Manual
C-6
Telephone Interfaces
E&M Signaling Specifications
PBX Tie Trunk: E&M Types I, II and V, 2-wire or
4-wire
PBX Station or Central
Office/PSTN:
FXO Loop Start, 2-wire
Key Telephone Systems,
Telephone Set, or PBX
CO Trunk:
FXS Loop Start, 2-wire
Interface Connectors
Per Channel:
RJ1CX modular jack for FXS and FXO type
interfaces, and RJ1CX modular jack for E&M type
interfaces
Indicators per Channel: OK, Local Off-Hook, Remote Off-Hook, Local
Speech, Remote Speech, and Test
Diagnostics: Self-Test, Loopback, Input Level Display
Signaling
E-Lead Current
Limit:
M-Lead Sensitivity:
DC Pulse Distortion:
<25 ma
<
1400 ohms at 48V
<
3% at 10 pps
Signaling Formats
AC:
DC:
DTMF & 2280 Hz (AC15, 4-wire)
Steady or Pulsed
DTMF Destoration: <1.5%
DC Loop Range
Including Instrument:
<900 ohms, 1373m (4500 feet) on 24 AWB wire
Signaling Types: I, II, and V, as strapped