NEC Univerge sv8500 Manual page 1187

13.1.2 Relationship between MG-PRI/PRA and Telephony Server (Internal PHI-PRI)
Managing MG-PRI/PRAs via Internal PHI-PRI
Internal PHI-PRI installed in the Telephony Server, manages the MG-PRI/PRAs to make an effective con-
nection and achieves a variety of services. If a fault occurs in the MG-PRI/PRAs controlled by the Tele-
phony Server (Internal PHI-PRI), the Telephony Server detects it and outputs the messages that PCPro will
display, thereby, maintenance personnel can realize the situation of the managed MG-PRI/PRA and the
cause of the fault.
On T1 interface, the Telephony Server supports a maximum of 768-channel, which indicates 32 MG-PRI/
PRAs if each one handles 24-channel. On E1 interface, the Telephony Server supports a maximum of 960-
channel, which indicates 32 MG-PRI/PRAs if each one handles 30-channel. The following shows the com-
munication model between the Telephony Server (Internal PHI-PRI) and MG-PRI/PRA.
Internal PHI-PRI is installed in the Telephony Server and controls MG-PRI/PRA. Call controlling between
Note:
Internal PHI-PRI and MG-PRI/PRA is performed via external Ethernet.
Telephony Server (Internal PHI-PRI) and MG-PRI/PRA
PCPro
Internal PHI-PRI
Telephony Server (Internal PHI-PRI)
iLP-PM
Connection Control
TCP
IP
Data Link
IP
Network
MG01 ~ MG32
ON
PWR LINE -LINE- LB
B D
TNS RCV
MG-PRI/PRA
iLP-PM
Connection Control
TCP
IP
Data Link
Network
VOL.2-934
MG-PRI/PRA
PSTN
(ISDN)
Tx/Rx LINK
MUSIC
10/100
IMP
MG-2M
LINE