A proprietary telephone (PT) user can listen to background music (BGM) through the built-in speaker while on-hook and idle.

BGM—External:

BGM can also be broadcast in the office through external pagers (loudspeakers) and can be turned on and off by an extension assigned as a manager.

[BGM]
•	Hardware requirement: A user-supplied external audio source, such as a CD player or radio.
•	The music heard through the PT is interrupted when going off-hook.
•	Each extension user can select the audio source.
•	Through system programming, it is possible to specify the maximum number of IP-PTs connected to a V-IPEXT card that can simultaneously perform the BGM feature (→ 1.2.1 BGM (Background Music)). Changing this setting may affect the number of simultaneous IP extension and IP CO line calls available on the IPCMPR card.

[BGM—External]
•	Hardware requirement: A user-supplied external pager
•	External pagers can be used with the following priorities: Trunk Answer From Any Station (TAFAS) → Paging → BGM (→ 1.13.1 Paging, 1.17.2 TAFAS (Trunk Answer From Any Station))

•	PC Programming Manual
•	2.9.4 [2-2] Operator & BGM
•	→ BGM and Music on Hold—Music Source of BGM2
•	2.9.9 [2-6-1] Numbering Plan—Main—Features
•	→ External BGM On / Off
•	→ BGM Set / Cancel
•	2.9.20 [2-11-1] Audio Gain—Paging/MOH
•	→ MOH—MOH 1 (Music On Hold 1)
•	→ MOH—MOH 2 (Music On Hold 2)
•	2.12.2 [5-2] External Pager
•	PT Programming Manual
•	None

•	1.3.5 BGM (Background Music)
•	2.1.2 External BGM (Background Music)