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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

#

Title / Requirement number

User story / functionality 

Importance
Status
Notes
1

D8XX_BLF-XML_FR-1-UAC

On D8xx IP phones, any PFK (programmable function key - physical or virtual) can be assigned to a function, which allows monitoring state changes of the configured SIP extension on another IP phone. This function shall be called "BLF-XML". The following state changes shall be visualized:

  • monitored SIP extension is in idle mode => idle
  • monitored SIP extension receives an incoming call => ringing
  • monitored SIP extension dials or accepts an incoming call => busy

Must Have

StatustitleDRAFT

This means, that the D8xx phone acts as a User Agent Client and the IP phone of the monitored extension as a User Agent Server (UAS).

2

D8XX_BLF-XML_FR-1-UAS

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

  • from any state => idle
  • from any state => ringing
  • from any state => busy

Must Have

StatuscolourGreentitleIMPLEMENTED

Fully implemented for idle, ringing, busy

3D8XX_BLF-XML_FR-2If such SIP extension is configured on other Snom phones in the same SIP domain, BLF shall work transparantly without the need of a B2BUA (IP PBX)

Must Have

StatuscolourGreentitleIMPLEMENTED

Fully implemented
4D8XX_BLF-XML_FR-3The 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).

Must Have

StatuscolourGreentitleIMPLEMENTED

Fully implemented
5D8XX_BLF-XML_FR-1-1-UAC

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

Must Have

StatuscolourGreentitleIMPLEMENTED

Fully implemented

6D8XX_BLF-XML_FR-1-1-1-UAC

The PFK LED shall be 

  • Off, when state is "idle"
  • Blinking, when state is "ringing"
Steadily lit
  • On, when when state is "busy"

Must Have

Suggestion:

stateidleringingbusy
LEDoffblinkingon
StatuscolourGreentitleIMPLEMENTEDFully implemented


7D8XX_BLF-XML_FR-1-1-2-UAC

The default PFK LED color shall be 

  • red, when state is "ringing" or "busy"

Must Have

StatuscolourGreentitleIMPLEMENTED

The default colour can be overridden by configuration

8D8XX_BLF-XML_FR-1-1-3-UAC

The PFK label

is

shall be composed of 3 areas:

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

Must Have

Image Added

9D8XX_BLF-XML_FR-1-1-3-1-UAC

The icon area (A) shall contain the following symbol, representing the state

  • state "idle" => white symbol of a person with handset
  • state "ringing" => red symbol of a person with handset plus an arrow pointing towards the handset
  • state "
talking
  • busy" => red symbol of a person with handset and 2 waves heading away from the handset

Must Have

Suggestion:

stateidleringingbusy
IconIdleImage AddedRingingImage AddedBusyImage Added


10D8XX_BLF-XML_FR-1-1-3-2-UAC

The name area (B) shall contain the following text representing a display name

area
  • (C) state area

    • or number (configurable) in default colour "white" (fix)

    • state "idle" => Monitored party
    • state "ringing" => Calling party > monitored party
    • state "busy" => Calling party <> monitored party

    Must Have

    Suggestion:

    stateidleringingbusy
    Name101 or Alex102 > 101 or
    Alice > Alex    		102 <> 101 or
    Alice <> Alex


    11D8XX_BLF-XML_FR-1-1-3-3-UAC

    The state area (C) shall contain the following text representing the state in default colour "white" (fix)

    • state "idle" => idle
    • state "ringing" => ringing
    • state "busy" => busy

    Must Have

    Suggestion:

    stateidleringingbusy
    Stateidleringingbusy


    12

    Image Removed

    9
    D8XX_BLF-XML_SR-2-UAS

    If the SRV (Snom phone) goes into State "Idle", a NOTIFY message shall be sent to the UA, containing the following information in its XML body:

    • switch off the assigned PFK LED
    • display the label icon "idle", the label name "name" or "number", the state "idle"
    		Must Have

    Image ModifiedImage ModifiedImage Modified

    10
    13D8XX_BLF-XML_SR-2-UAC

    If the SRV (IP-PBX or another Snom phone) is in State "Idle", the UA shall

    • switch off the assigned PFK LED
    • display the label icon "idle", the label name "name" or "number", the state "idle"
    		Must Have
    11

    14D8XX_BLF-XML_SR-3-UAS

    If the SRV (Snom phone) goes into State "Line seizing", a NOTIFY message shall be sent to the UA, containing the following information in its XML body:

    • switch off the assigned PFK LED
    • display the label icon "idle", the label name "name" or "number", the state "idle"
    12


    15D8XX_BLF-XML_SR-4-UASIn case the notifier being an IP-PBX or another Snom phone: Ringing state => PFK LED blinking fast (colour?), PFK label & icon "ringing"Must Have
    13

    16D8XX_BLF-XML_SR-5-UASIn case the notifier being an IP-PBX or another Snom phone: Busy state => PFK LED on (colour?), PFK label & icon "on a call"Must Have
    14

    17D8XX_BLF-XML_SR-6-UASIn case the notifier being an IP-PBX: Hold state => PFK LED blinking slow (colour?), PFK label & icon "on hold"Must Have
    15

    18D8XX_BLF-XML_SR-7-UASIn case the notifier being an IP-PBX: DND state => PFK LED on (colour?), PFK label & icon "DND on"Must Have

    User interaction and design

    ...