NEC Univerge sv8500 Manual page 1022

The following commands are available for MG-BRI with the firmware versions: SP-3709 BRI MG BSC
Note:
PROG-A Issue 18 or later and SP-3708 BRI BOOT PROG-A Issue 7 or earlier.
Sub-command
1 CALL_HOLD
2 RTP_STOP_DETECT
Enable MG Based Call Retention.
Assign RTP Receive Stop Detect timer used for MG Based Call Re-
tention.
VOL.2-769
Function
MG-BRI