NDA-24296 CHAPTER 3
Page 541
Revision 1.0
PH-M16
Line Test
PH-M16
Line Test
1. General Function
This circuit card controlled by CPU is used for line test of a subscriber’s line. The circuit card supports to
send howler tone to external test equipment, besides the circuit card can detect or send various tones, and
send PB (DTMF) signal for automatic trunk test.
Note:
A system cannot send Howler Tone during line test. The number of line available the line test/automatic
trunk test at the same time is only one.
Figure 3-164 Location of PH-M16 (LTST) card within the System (1-IMG System)
TEL
TEL
PIM
LPRA
TEST
EQ
LTST
GT
CPU
M
U
X
TSW
LC
LC
EXTENDED I/O BUS
EXTENDED I/O BUS