ADTRAN 616, 612, 606, 624, 604 system manual FXS Interface Setup Instructions Step Action

Section 4 User Interface Guide Total Access 600 Series System Manual

FXS Interface Setup Instructions

Step Action

1From the main menu, select INTERFACES.

2Highlight the CONFIG menu for the FXS interface and press <ENTER>.

3Right arrow to select MODE and choose LOOP START, GROUND START, TANDEM (E&M), TR08 SINGLE, TR08 UVG, or DPO.

This mode should be set based on the network configuration and the operation of each FXS port. All FXS ports are independent and do not need to have the same mode.

4Set the TX (dB) or transmit direction level for each port. The default value is recommended.

5Set the RX (dB) or received direction level for each port. The default value is recommended.

6Set the SVC MODE to IN SERVICE to activate the port.

7Set the LINE Z (line impedance) of each port based on the size of the network. The default value is recommended.

Set the MSG IND to DISABLE or ENABLE. When set to ENABLE, talk path is

8always open, even in on-hook conditions, in order for FXS message tones to pass through. Disabling this feature will allow higher on-hook voltage but will not allow on-hook messaging other than caller ID.

Configure the on-hook battery voltage using the BATT MODE field. For most IAD installs, the FXS loop is short with 6 to 7 V present on tip / ring. To reduce power dissipated during off-hook conditions, the battery is lowered for short loop lengths. When set to AUTO SWITCH, the IAD uses a higher on-hook

9battery voltage (48-52 V). When off-hook, it automatically switches to low battery (24-26 V) to minimize power dissipation. When set to LOW BATTERY mode, the higher battery is not used and the voltage is a constant 26 V even while on-hook. The tip/ring voltage is reduced to 26 V when using the LOW

BATTERY mode.

Specify the interval of battery removal during a forward disconnect state using the FWD DISC TIMER field. Choices are FOLLOW SWITCH (default), 500MS, 750MS, 1000MS, and 2000MS. When using ATM mode, there is an additional

choice of IGNORE SWITCH. If the timer is set to FOLLOW SWITCH, the

Total Access 6XX will follow the switch at all times; this is normal operation. If

10a time period has been selected, the Total Access 6XX will remove battery for the specified time period OR as long as the switch requests battery removal, whichever is longer. For example, if the timer expires but the switch continues to request battery removal, the Total Access 6XX will follow the switch and continue to remove battery. For ATM mode, if the timer is set to IGNORE SWITCH, the IAD will never remove battery.

164 © 2004 ADTRAN, Inc. 61200624L1-1B