SmartSwitch 1800 Voice Configuration

4W EM is the normal setting for a PBX EM tie-line interface that uses one pair of wires for the incoming voice signal and another pair of wires for the outgoing voice signal. 2W EM is for an EM tie line that uses a single pair of wires for both the incoming and outgoing voice signal.

AC 15A or AC 15C are 4-wire signaling systems used by PBXs to communicate with each other and other PBX-like communications equipment.

2W EM and 4W EM can be conÞgured in these modes, via the switches on the front of the SmartSwitch:

¥2W EM or 4W EM IS (Immediate Start), the industry standards for EM operation;

¥2W EM or 4W EM DD (Delay Dial), which will cause the SmartSwitch to expect an attached PBX to raise its M-lead to request a dial register. The SmartSwitch will respond as follows: 1) toggle the E-lead, 2) send a dial register to the PBX, 3) return the E-lead to its original state, and 4) wait for dial digits from the PBX (no dial tone is transmitted to the PBX).

¥2W EM or 4W EM WS (Wink Start), which will cause the SmartSwitch to expect an attached PBX to raise its M-lead to request a dial register. The SmartSwitch will respond by sending a dial register to the PBX. When the PBX indicates it is ready for dial digits (no dial tone is transmitted to the PBX), the SmartSwitch will toggle the E-lead. When the E-lead returns to its original state, the PBX will transmit dial digits to the SmartSwitch.

If 2W EM TE or 4W EM TE (Timed EM) is selected, you can specify a delay time for when the E-Lead follows the M-Lead in the TE Timer parameter (see above).

The default value for this parameter is Loop Start.

Telephony Type

This parameter, in conjunction with the Interface parameter (see above) speciÞes the type of interface that will be used by the voice channel. Refer to your SmartSwitch 1800 hardware documentation for more information about selecting the appropriate interface. If EM is speciÞed, you must also set Switch 2 on the front of the SmartSwitch to select an EM type. Refer to your hardware documentation for more information on EM Switch Settings.

The default value for this parameter is OPX.

Hunt Group

This parameter is not currently supported and must be set to None.

Suppression

This parameter speciÞes a level of suppression of background noise. For most calls, low suppression should be sufÞcient. The higher the suppression level, the greater the possibility that low-volume voice will be lost; therefore, suppression levels higher than low should be used only if it can be certain that background noise will be low or all of the voice transmitted will be sufÞciently louder than the background noise.

Configuring Voice Ports

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Cabletron Systems FRX6000, FRX4000, 1800 manual Telephony Type, Hunt Group, Suppression

1800, FRX4000, FRX6000 specifications

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