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 subscribers line. The circuit card supports to
send howler tone to external te st equipmen t, besides th e circuit card can detect or sen d vari ous 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 Loc ation o f PH-M 16 (LTST) card wi thin the System (1-IMG S yst em)
TEL
TEL
PIM
LPRA
TEST
EQ LTST GT CPU
M
U
X
TSW
LC
LC
EXTENDED I/O BUS
EXTENDED I/O BUS