CHAPTER 2 NDA-24296
Page 88
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
sending 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 available lines within the line test/
automatic trunk test at the same time is only one.
Figure 2-34 Location of PH-M16 (LTST) Card Within the System
LC
LC
I
N
T
TSW
TEL
TEL
PIM
LPRA
LT ST
TEST
EQ
GT
EXGT
CPU
EXTENDED I/O BUS
EXTENDED I/O BUS