Configuring Analog Voice Subscriber Lines; Signal Tone; Fxs Voice Subscriber Line; Fxs Interface - HP FlexNetwork MSR Series Configuration Manual

Configuring analog voice subscriber lines

This chapter covers the configuration of analog FXS, FXO, and E&M voice subscriber lines.

Signal tone

Call progress tones (CPTone), also called signal tones, are generally composed of several discrete
single-frequency tones that are played repeatedly on a make-break ratio basis. Signal tones,
including dial tone, ringback tone, and busy tone, are used to inform users of the call progress.
Signal tones vary greatly with countries as per their national standards.
Signal tones support two modes: country mode and custom mode. In addition, the amplitude of
signal tones can be customized to avoid signal tone detection failure.

FXS voice subscriber line

FXS interface

A foreign exchange station (FXS) interface uses a standard RJ-11 connector and a telephone cable
to directly connect to an ordinary telephone or a fax machine. An FXS interface accomplishes
signaling exchange based on the level changes on the Tip/Ring line and provides ring, voltage, and
dial tone.

CID

Calling identity delivery (CID) enables called terminals to display the calling identity information,
including the calling number, calling name, date, and time.
With the CID function, calling numbers and calling time in single-data-message format are
transmitted or received in an on-hook state. When the CID function is combined with services such
as call forwarding—unconditional (CFU) and call forwarding—busy (CFB), calling identity
information can also be transmitted if required. A message in the single-data-message format
contains the following information:
•
Date and time when the voice call occurs (MM DD hh:mm)
•
Calling number if CID is enabled on the device
•
P if CID is disabled on the device
•
O if the terminating PBX fails to obtain the calling number (for example, the originating PBX end
does not send it)
A message in the multiple-data-message format contains the following information:
•
Date and time when the voice call occurs (MM DD hh:mm)
•
Calling number and calling name if CID is enabled on the device
•
Two Ps for the calling number and the calling name if CID is disabled on the device
•
O if the terminating PBX fails to obtain the calling number (for example, the originating PBX end
does not send it)
•
O if the terminating PBX fails to obtain the calling name (for example, the originating PBX end
does not send it)
The FXS voice subscriber line sends the calling identity information to the called telephone. The
calling identity information is sent to the called telephone through frequency shift keying (FSK)
modulation between first and second rings. Therefore, the called user must pick up the telephone
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