Specifications

Matrix SETU ATA211 System Manual 55

Default: Polarity Reversal.

• Open Loop Disconnect Timer: If you selected Open Loop Disconnect, you may set the value of

this timer, as required. Default: 500 milliseconds.

3. Select the Subscriber Type for SETU ATA211. Default: Gateway.

When SETU ATA211is interfaced with a service provider server—ITSP, the Matrix ETERNITY IP-PBX, or

any other PBX—that supports supplementary services that require dialing of Flash, like Call Hold, Call

Transfer, Call Waiting, etc., you must select the Subscriber Type for SETU ATA according to the extent of

feature access you want on the FXS port connected to system.

• Select Network, if you want to use the supplementary services supported by the PBX. When you set

SETU ATA211 in the Network mode, you can access the service provider features by dialing flash. You

will not be able to access the local features of SETU ATA211.

• Select Gateway, if you want to use the supplementary features of SETU ATA211 primarily. In the

Gateway mode, you will also be able to access the supplementary services of the service provider

which required the dialing of Flash. See “Supplementary Services of Service Provider”.

4. Select the appropriate CLI Type according to the CLI Type supported by the telephone instrument

connected to the FXS port.

SETU ATA211 supports 3 signaling protocols for CLI on the FXS port:

•DTMF

• FSK-BellCore

• FSK-ITU V.23

Default: FSK-ITU V.23

5. Configure the Flash Timer, as per your requirement. The Flash timer signifies the time period for which the

loop current breaks. SETU ATA211 uses this event to activate various features such as Call Hold, Call

Transfer, etc. Default: 600 msec.

6. To improve quality of speech, keep the Echo Cancellation

check box enabled. Default: Enabled.

Also define the Tail Length depending on the length of the echo. Valid Range: 8 msec to 32 msec.

Default: 32 msec.

7. Select the appropriate AC Impedance according to the AC Impedance supported by the device connected

to the FXS port of SETU ATA211. The device may be a phone or a PBX. You may select from the following

impedance options:

• 600 

• 900 

• 270  + (750  || 150 nF)

• 220  + (820  || 115 nF)

• 370  + (620  || 310 nF)

• 320  + (1050  || 230 nF)

• 350  + (1000  || 210 nF)

• 200  + (680  || 100 nF)

• Default = 600 

5. Echo Cancellation is a technique that allows isolation and filtering of unwanted signals caused by echoes during speech.