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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 | Notes |
|---|---|---|---|---|
| 1 | D8XX_BLF-XML_FR-1 |
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:
| Must Have | This means, that the D8xx phone acts as a User Agent Client (UAC) and the IP phone of the monitored extension acts as |
User Agent Server (UAS). | |
| 2 | D8XX_BLF-XML_FR- |
2 | 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, at least when one of the following state changes occur:
| Must Have | Fully implemented for idle, ringing, busy |
| 3 |
Must Have
| D8XX_BLF-XML_FR-3 | 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). | Must Have | Fully implemented |
| 4 | D8XX_BLF-XML_FR-1-1 |
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 | Fully implemented |
| 5 | D8XX_BLF-XML_FR-1-1-1 |
The PFK LED |
- state "idle" => off
- state "ringing" => blinking
- state "busy" => on
Must Have
Suggestion:
behaviour and colour shall be according to this table |
|
|
The default PFK LED color shall be
|
Must Have |
The default colour can be overridden by configuration
Fully implemented |
| 6 |
| D8XX_BLF-XML_FR-1-1- |
| 2 | The PFK label shall be composed of 3 areas:
| Must Have |
|
| 7 | D8XX_BLF-XML_FR-1-1- |
| 2-1 |
The label icon area (A) shall contain the following symbol, representing the state
| Must Have | Suggestion:
|
|
| 8 | D8XX_BLF-XML_FR-1-1- |
| 2-2 |
The label name area (B) shall contain the following text representing a display name or number (configurable) in default colour "white" (fix)
| Must Have | Suggestion:
|
|
| 9 | D8XX_BLF-XML_FR-1-1- |
| 2-3 |
The label state area (C) shall contain the following text representing the state in default colour "white" (fix)
| Must Have | Suggestion:
|
|
User interaction and design
| User interaction | Requirement reference | Design reference | ||||
|---|---|---|---|---|---|---|
| SRVUAS | UAUAC | State | SRVUAS | UAUAC | Figma | Screenshot |
| does nothing | does nothing | Idle | BLF-XML-02-SRV_IDLE | BLF-XML-UA-02-02 | Figma requirement (702 "idle") | |
| lifts up the receiver | does nothing | Busy | BLF-XML-SRV-02-02 | |||
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