Figure 5-6 - 2-Wire Testing With Responders - AMERITECH AM5 Instruction Manual

AM5(e) Classic Instruction Manual
AM5(E) CLASSIC
T X / 2 W
HANDSET
to DIAL
Figure 5-6 — 2-Wire Testing with Responders
A 2-Wire network is typical of a business or residential environment where a user dials
up a distant location (switched access line) through a PBX and/or a Central Office.
The responders are connected to distant telephone numbers just like any other end-
instrument. Like any end-instrument, a responder remains on-hook until a ringing
signal is sent to it. It then goes off-hook automatically, (within 2.5 seconds) and applies
a tone (usually 1.004 kHz at -10.0 dBm) to the line. The responder then goes quiet and
waits for DTMF digits which will command it into its various modes of operation or
cause it to go on-hook.
Different DTMF digits can be sent to the responder to command it into its test modes.
The AM3-2C can be used to perform far-to-near tests to determine far-to-near level and
frequency, idle channel noise, and noise with tone.
In addition to the AM3-2C functions, the AM3-2A can also be used to perform far-to-
near gain slope and near-to-far level tests. In near-to-far tests the responder receives a
tone from the AM5(e) Classic. Results are then transmitted as a frequency deviation of a
returned signal. This can be observed at the AM5(e) Classic.
Both responders are described in one Instruction Manual, "Model AM3-2A DTMF
Commandable 2 Wire Responder and Model AM3-2C Automatic Milliwatt Test Line
Instruction Manual" (18-0006).
November 19, 1997
(18-0047)
AM3-2A or 2C
Responder
LOCAL
CO
C O
T I E
PBX
TELEPHONE NETWORK
F X
DISTANT
CO
(END OF SECTION 5)
Page 5-11
LINE FUNCTIONS
AM5(E) CLASSIC
T X / 2 W
HANDSET
to DIAL
PBX