NEC DB2000 Service Manual page 138

M5-TY0442 DPX321880OT DIPLEXOR
M5-TQ0426 13Mhz TCXO
GND
O/P
13 Mhz TCXO (Temperature compensated crystal oscillator)
GSM GND
1
6
GND COMMON
GND
GSM1800
2 3
02
5 4
GND
GND
N/C Vcc
IC400
X200