NDA-24296 CHAPTER 3
Page 211
Revision 1.0
PH-CK17
Phase Lock Oscillator

The MUSIC ROM also located on this circuit card contains the hold tone, and is supplied to the TSW circuit

card. When an external music on hold is applied t o the 4 IMG system, this circuit card provides the interface for

the external hold tone source.

Figure 3-21 Music Source
SEL
SEL
SEL
Speech Path Memory
for Music/Tone
Music/Tone
MUSIC ROM
TDSW00
PLO#0
TONE ROM
SEL
SEL
SEL
Speech Path Memory
for Music/Tone
Music/Tone
MUSIC ROM
TDSW1
PLO#1
TONE ROM
FM
FM