NEC 2400 ipx clock can also be used as an alternate clock supply route in case of DCS clock failure.

NDA-24296 CHAPTER 3
Page 199
Revision 1.0
PH-CK16-A
Phase Lock Oscillator
Note 2: When this car d is mount ed in TSWM0 of the IPX-U system, the DCS clock fr o m the ISWM is used. The DTI
clock can also be used as an alternate clock supply route in case of DCS clock failure.
Note 3: When this card is mounted in ISWM, set to “ON ( =CLK card is not used).”
If mounted in TSWM0 on LN/L MG,
•set to “OFF” if TSWM1 (CLK card, PH-CK18) on the same LN/LMG is used.
•set to “ON” if TSWM1 (CLK card, PH-CK18) on t he same LN/LMG is not used.
SW02
Note 2
1ON DIU 0 is used a s the D TI clock supply route zero.
OFF DIU 0 is not used.
2ON DIU 1 is used a s the D TI clock supply route one.
OFF DIU 1 is not used.
3ON DIU 2 is used a s the D TI clock supply route two.
OFF DIU 2 is not used.
4ON DIU 3 is used a s the D TI clock supply route three.
OFF DIU 3 is not used.
5ON ×1.5 M clock for DIU 0.
OFF 2 M clock for DIU 0.
6ON ×1.5 M clock for DIU 1.
OFF 2 M clock for DIU 1.
7ON ×1.5 M clock for DIU 2.
OFF 2 M clock for DIU 2.
8ON ×1.5 M clock for DIU 3.
OFF 2 M clock for DIU 3.
SW10
1ON External hold tone source is use d via FM lead.
OFF ×MUSIC ROM is used as the hold tone.
2
Note 3
ON CLK card is not used.
OFF CLK card is used.
SWITCH
NAME SWITCH NO. SETTING STANDARD
SETTING MEANING