AudioCodes Mediant 800B - FXO Operating Modes; FXO Operations for IP-To-Tel Calls

Version 7.2 645 Mediant 800B Gateway & E-SBC
User's Manual 28. Analog Gateway
The FXS Coefficient types provide best termination and transmission quality adaptation for
two FXS line type interfaces. The parameter affects the following AC and DC interface
parameters:

DC (battery) feed characteristics

AC impedance matching

Transmit gain

Receive gain

Hybrid balance

Frequency response in transmit and receive direction

Hook thresholds

Ringing generation and detection parameters
 To select the FXO and FXS Coefficient types:
1. Open the Analog Settings page (Setup menu > Signaling & Media tab > Gateway
folder > Analog Gateway > Analog Settings).
Figure 28-10: Configuring FXS/FXO Coefficient Types
2. From the 'FXS Coefficient Type' drop-down list (FXSCountryCoefficients), select the
required FXS Coefficient type.
3. From the 'FXO Coefficient Type' drop-down list (CountryCoefficients), select the
required FXO Coefficient type.
4. Click Apply, and then reset the device with a save-to-flash for your settings to take
effect.
28.13 FXO Operating Modes
This section provides a description of the device's FXO operating modes:

For IP-to-Tel calls (see 'FXO Operations for IP-to-Tel Calls' on page 645)

For Tel-to-IP calls (see 'FXO Operations for Tel-to-IP Calls' on page 648)

Call termination on FXO devices (see 'Call Termination on FXO Devices' on page 650)
28.13.1 FXO Operations for IP-to-Tel Calls
The FXO device provides the following operating modes for IP-to-Tel calls:

One-stage dialing (see 'One-Stage Dialing' on page 646)
• Waiting for dial tone (see 'Two-Stage Dialing' on page 647)
• Time to wait before dialing
• Answer supervision

Two-stage dialing (see 'Two-Stage Dialing' on page 647)

Dialing time: DID wink (see 'DID Wink' on page 647)