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Use case#1: A secretary's phone shall display the call status of the boss's line, allowing the secretary to know whether the boss is on a phone call or not. This will enable the secretary to make the decision to put the new caller on hold or let them through to the boss.
Use case#2: Call centers and customer support groups have also a need for BLF: it enables employees to see if their colleagues are free to take a support call or if their supervisor is on another line and unable to help another customer.
Use case#3: BLF is needed by teams working on a specific project: supervisors can monitor team members' extensions and vice versa so all team members are aware of each other's current status.

Requirements

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Requirement title

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Functionality

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DXX:Notify-States

Preconditions

On Snom IP phones acting as UAS, any SIP extension having an active subscription of its state changes, shall sent a notification SIP message (NOTIFY) to the UAC, when one of the following state changes occur:

from any state => terminated
from any state => trying
from any state => early/proceeding
from any state => confirmed

The NOTIFY XML body must contain the necessary information for the UAC to perform state translation and visualization.

Requirements

#

Requirement title

Functionality

Importance

Implementation status

1

Status

colour

Green

title

ESSENTIAL

Status

colour

Green

title

FULLY IMPLEMENTED

2

D8XX:BLF-XML:Functionality

On D8xx IP phones, any PFK (programmable function key - physical or virtual) can be assigned to a key type called "BLF-XML", and a key number, which corresponds to a SIP extension on another IP phone in the same VoIP environment. The following functionality is required:

Monitoring certain states of the configured SIP extension, see details below
Quick-dial to the configured SIP extension in idle state
Pick-up an incoming call to the configured SIP extension

Status


colour	Green
title	ESSENTIAL

Status


colour	Green
title	FULLY IMPLEMENTED

32

D8XX:BLF-XML:Functionality:Configuration

The assignment shall be configured either manually via web user interface (WUI) and/or phone user interface (PUI), and automatically via auto-provisioning (HTTP/TFTP setting server), SRAPS, or remote management (TR-069).

Status


colour	Green
title	ESSENTIAL

Status


colour	Green
title	FULLY IMPLEMENTED

43

D8XX:BLF-XML:Functionality:Monitoring:Translation

Dialog states of the configured SIP extension shall be monitored, processed, and translated according to its direction.

UAS state	Dialog state (NOTIFY)	Direction	Translated state
idle mode	terminated	-	idle
offhook	trying	initiator	offhook
incoming call ringing	early/proceeding	recipient	ringing
incoming call accepted	confirmed	recipient	talking
outgoing call ringing	early/proceeding	initiator	calling
outgoing call accepted	confirmed	initiator	talking

Status


colour	Green
title	ESSENTIAL

Status


colour	Yellow
title	PartLY IMPLEMENTED

54

D8XX:BLF-XML:Functionality:Actions

According to the translated state When the PFK is pressed, the following actions are allowed , when the PFK is pressed:according to the translated state

Dialog state

terminated

trying

early/proceeding

confirmed

Translated state	idle	offhook	calling	ringing	talking

Direction-initiatorinitiatorrecipientinitiator/recipient


Allowed actions	Quick-dial	-	-	Pick-up	-

Status


colour	Green
title	ESSENTIAL

Status


colour	Yellow
title	PartLY IMPLEMENTED

65D8XX:BLF-XML:Functionality:Monitoring:Visualization

On D8xx series, during an active subscription, state changes of the monitored SIP extension shall be visualized on both, PFK LED and PFK label.

Status


colour	Green
title	ESSENTIAL

Status


colour	Green
title	FULLY IMPLEMENTED

76D8XX:BLF-XML:Functionality:Monitoring:Visualization:LED

The PFK LED behaviour and colour shall be according to this table

Dialog stateterminated

trying

early/proceeding

confirmed

the translated state:

Translated state	idle	offhook	calling	ringing	talking	Direction	-	initiator	initiator	recipient	initiator/recipient
LED behaviour	off	on	on	blinking	on
LED colour	-	red	red	red	red

Status


colour	Green
title	ESSENTIAL

Status


colour	Yellow
title	PartLY IMPLEMENTED

87D8XX:BLF-XML:Functionality:Monitoring:Visualization:Label:Areas

The PFK label shall be composed of 3 areas:

(A) icon area	(B) name area
	(C) state area

Status


colour	Green
title	ESSENTIAL

Status


colour	Green
title	FULLY IMPLEMENTED

98D8XX:BLF-XML:Functionality:Monitoring:Visualization:Label:icon-area

The label icon area (A) shall contain the following a graphical symbol and colouraccording to the translated state

Dialog state	terminated	trying	early/proceeding		confirmed
Translated state	idle	offhook	calling	ringing	talking	Direction	-	initiator	initiator	recipient	initiator/recipient
Graphical symbol	tbd	tbd	tbd	tbd	tbd
Colour	white/tbd	white/tbd	white/tbd	white/tbd	white/red

Status


colour	Green
title	ESSENTIAL

Status


colour	Yellow
title	PartLY IMPLEMENTED

109D8XX:BLF-XML:Functionality:Monitoring:Visualization:Label:name-area
The label name area (B) shall contain a text using either the derived from display name or number (configurable) of the monitored / calling party according to translated state and direction. Depending on the available space, the text shall be scrolled.
Dialog stateterminated
trying
early/proceeding
confirmed
Translated state idle offhook calling ringing talking
Direction - initiator initiator recipient initiator recipient
Text (based on target) local local > local > remote remote > local remote <> local local <> remote
Text colour white white white white white white
Example (using number) 101 101 >

101 > 102 102 > 101 102 <> 101

101 <> 102

Example (using display name) Alex Alex > Alex > Alice Alice > Alex Alice <> Alex Alex <> Alice

Status
colour Green
title ESSENTIAL
Status
colour Yellow
title PartLY IMPLEMENTED
1110D8XX:BLF-XML:Functionality:Monitoring:Visualization:Label:state-are
The label state area (C) shall contain a text and colour representing the translated state
Dialog
state
terminated
trying
early/proceeding
confirmed Translated state idle offhook calling ringing talking Direction - initiator initiator recipient initiator/recipient
text idle offhook calling ringing talking
colour white white white white white

Status
colour Green
title ESSENTIAL
Status
colour Yellow
title PartLY IMPLEMENTED

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Old Version 47

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Key

Requirements

Preconditions

Requirements

trying	early/proceeding		confirmed	Translated state	idle	offhook	calling	ringing	talking	Direction	-	initiator	initiator	recipient	initiator/recipient
text	idle	offhook	calling	ringing	talking
colour	white	white	white	white	white