Version 7.2 591 Mediant 1000B Gateway & E-SBC
User's Manual 27. Analog Gateway
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 27-10: 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.
27.13 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 591)
For Tel-to-IP calls (see ''FXO Operations for Tel-to-IP Calls'' on page 594)
Call termination on FXO devices (see ''Call Termination on FXO Devices'' on page
596)
27.13.1 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 591)
• Waiting for dial tone (see ''Two-Stage Dialing'' on page 593)
• Time to wait before dialing
• Answer supervision
Two-stage dialing (see ''Two-Stage Dialing'' on page 593)
Dialing time: DID wink (see ''DID Wink'' on page 593)
27.13.1.1 One-Stage Dialing
One-stage dialing is when the FXO device receives an IP-to-Tel call, off-hooks the PBX
line connected to the telephone, and then immediately dials the destination telephone
number. In other words, the IP caller doesn't dial the PSTN number upon hearing a dial
tone.