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P company's terminal call MCU in ISDN but can not set up connection

Publication Date:  2019-07-24 Views:  164 Downloads:  0

Issue Description

Terminal is P company, ISDN 128, MCU is 8620. The MCU can set up connection when it call terminal, but the terminal can not set up connection when it call MCU.

Alarm Information

The MCU local management console show the information: connection port is cleared

Handling Process

Change the calling mode from 64K*2 to 128K, then it become OK.

Root Cause



P company's terminal usually use 64K*2 mode, if we need connect it to our device the mode should be changed to 128K.