
Analog Voice Modules
Passport 4400 Hardware Installation Manual
6-2
Signaling Formats
Use the information and figures below to ensure you are using the correct
interfaces in your Analog Voice Modules.
FXS
•
Provides ringing voltage and battery to the attached telephone
equipment.
•
Selected when the voice channel is connected directly to a telephone
instrument, to the trunk side of a key telephone system, or to the central
office trunk of a Private Branch Exchange (PBX).
•
Must never be connected to a telephone interface that also provides
ringing voltage, such as Central Office equipment, a PBX station, or off-
premise circuit.
Figure 6-2. Interface Requirements for FXS
FXO
•
Normally attaches to the station side of a PBX or Central Office loop
start equipment.
•
Accepts ringing voltage from the attached Central Office line of PBX but
does not provide ringing voltage or battery.
Figure 6-3. Interface Requirements for FXO
Voice Channel
FXS
Key
Telephone
System
PBX
T
runk S
ide
S
tat
ion S
ide
When the Telephone Interface is:
Use
FXO
C
PBX
Voice Channel
T
runk
S
id
e
An
al
og
St
at
ion Side
When the Telephone Interface is:
Use
Содержание Passport 4430
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Страница 10: ...About this document Passport 4400 Hardware Installation Manual x ...
Страница 16: ...Introduction Passport 4400 Hardware Installation Manual 1 6 ...
Страница 24: ...Installing the Passport 4400 Passport 4400 Hardware Installation Manual 2 8 ...
Страница 56: ...T1 E1 and Digital Voice Modules Passport 4400 Hardware Installation Manual 5 16 ...
Страница 84: ...Interface Modules WAN Passport 4400 Hardware Installation Manual 7 8 ...
Страница 106: ...General Installation Passport 4400 Hardware Installation Module 10 8 ...
Страница 148: ...Regulatory and Telephone Company Requirements Passport4400 Hardware Installation Manual B 16 ...
Страница 158: ...Specifications Passport 4400 Hardware Installation Manual 10 ...
Страница 164: ...T1 Voice Module Cabling Requirements Passport 4400 Hardware Installation Manual D 6 ...
Страница 168: ...PBX Interface Connection Diagrams Passport 4400 Hardware Installation Manual E 4 ...
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