Setting 4E1 Parameters

Procedure

1. Choose System Settings > Network and click the 4E1 tab.
2. Set the 4E1 parameters listed in Table 3-22.
   Table 3-22  4E1 parameters

   Parameter	Description	Setting
   Account Password	These are the account and password used by the endpoint when the endpoint initiates an H.323 conference.	For detailed information of the conference account and password, contact the administrator of the videoconferencing system.
   Clock mode	The following clock modes are available: Preferred clock: If this option is selected, the endpoint uses the internal clock and provides the clock to the remote device that is connected to the 4E1 interface of the endpoint. In a point-to-point call, Clock mode for either endpoint must be set to Preferred clock. Alternate clock 1, Alternate clock 2, Alternate clock 3 and Alternate clock 4: If one of these options is selected, the endpoint obtains the clock from a line.	If the endpoint is connected to an MCU, set the MCU clock as the master clock and the endpoint clock as the slave clock. If the endpoint is connected to another endpoint, set the clock mode of one endpoint to the master clock and the clock mode of the other endpoint to the slave clock.
   Signaling mode	Specifies the transmission mode for 4E1 signaling. Cyclic redundancy checking (CRC) is used to test the network condition. The CRC result indicates the frame error rate. When an option that contains CRC4 is selected, the endpoint tests the network for bit errors.	To use channel associated signaling, you can select CAS. To use common channel signaling, you can select CCS.
   Sensitivity	Set this parameter based on the length of the 4E1 line used between the endpoint and the nearest network node, such as a switch.	If the distance between the endpoint and the nearest network node is longer than 100 m, select Long line. If the distance between the endpoint and the nearest network node is shorter than 100 m, select either Long line or Short line. Long line is recommended.

3. Click Save.