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DHY-03 User Handbook
Parameters 200-207 are for User1 Disconnect Tone Settings
200 – User1 DT Settings –
(see Table 3-18) – for indication
Disconnect Tones
only, actual values set below
201 – User1 DT Settings –
(0 = no cadence or hi byte = on time & lo
Cadence Pattern 1
byte = off time)
202 – User1 DT Settings – SuccessTime/ (time in 8ms units – 2 parameters allow for
Cadence Pattern 2
double patterns)
203 – User1 DT Settings –
(no. of cycles plus coefficients defines
Cycles for Transform
tone tested)
204 – User1 DT Settings – Coefficient
for Tone 1
(single test tone)
205 – User1 DT Settings – Coefficient
for Tone 2
(dual test tone)
206 – User1 DT Settings – Threshold Level (minimum acceptable signal level)
207 – User1 DT Settings – Reserved
Similarly to User1 Disconnect Tone Settings
User2 Disconnect Tone Parameters are 208-215
User3 Disconnect Tone Parameters are 216-223
User4 Disconnect Tone Parameters are 224-231
User5 Disconnect Tone Parameters are 232-239
User6 Disconnect Tone Parameters are 240-247
Extended Parameter Description
Calibration Register – parameter 3
This register is used to perform the calibration cycle described in page 18.
The settings are as follows :
Calibrate & Save Network Cancellation Coefficients
= 1
Calibrate Telephone Interface Hybrid Coefficients without changing AC Termination = 4
Calibrate Telephone Interface Hybrid Coefficients changing AC Termination
= 8
Changing the telephone interface hybrid coefficients will cause the network cancellation
coefficients to be incorrect so will force a calibrate & save of the network coefficients once
the hybrid values are set.
Telephone Interface Meter Select – parameters 7
Allows user to set the function of the bargraph meters and is sum of values selected for
the top row, bottom row and debug status (selected via parameter 6 and jumper JP2 or
dipswitch 10).
Network
Received
Network
Transmit
Line Input
Line
Output
Cancellation
Status
Cadence
Status
Top Row
0
1
2
3*
Bottom
Row
0
4
8*
12
Debug
Status
0
16
32
48
64*
80
Table 3-1 : Meter Select Parameter Values.
* = default value and set value for firmware versions before v1.40
SERIAL PORT CONTROL
SERIAL PORT C
ONTR
OL
3