1.11 M186 Feature ManualFeature Manual References1.6.3 Flexible Buttons2.1 Capacity of System ResourcesOperating Manual References1.3.42 Message Waiting1.11.4 Music on HoldDescriptionMusic can be played to any party on hold. The following audio sources are available:a) Internal audio sourceb) External audio sourcec) ToneMusic Source Assignment[KX-TDA100/KX-TDA200/KX-TDA600]BGM1, BGM2, and tone can be selected as Music on Hold through system programming. External musicport 1 is assigned to BGM 1. It is possible to select whether external music port 2, internal audio source 1,or internal audio source 2 is assigned to BGM2.Having two external music ports, for example, allows the use of the BGM feature (→ 1.2.1 BGM(Background Music)), while assigning a separate external music source (e.g., company message,advertisement) to Music on Hold.[BGM Number and the Audio Source]Separate music sources can be assigned for the Music on Hold and the BGM features.[KX-TDA50]Only one external music port is available. If BGM is selected, it is possible to select whether external musicport, internal music port 1, or internal music port 2 is assigned to BGM.Conditions• Hardware Requirement: User-supplied audio device (CD player, radio, etc.) when an external musicsource is assigned.• Volume ControlIt is possible to change the volume of an internal and/or external audio source.• Each tenant can select a desired Music on Hold out of the available audio sources. (→ 1.17.3 TenantService)BGM No. Available Audio Sources12External music port 1External music port 2/Internal audio source 1 or 2