Excalibur ISX 5312, Operation Manual

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Excalibur ISX 5312/5314 T-1 Multiplexer Installation and Operation
1-8
Dial-In Access for Front Panel Emulation
The ISX 5312/5314 provides dial-in access via a dial modem and a Public Switched
Telephone Network (PSTN) line. You can use a Milgo dial modem or a generic modem
that supports Hayes AT operation. The modem must be set for Auto-Answer. From the
ISX 5312/5314’s front panel, the Protocol parameter in the NMS submenu must be set to
None or Ethernet. When communication is established via the modem link, front panel
emulation can be initiated using Milgo’s optional Front Panel Controller Application for
Windows.
The dial-in access feature allows you to use the entire T-1 bandwidth for data and still
have control and management of remote units via the modem link. You can also use the
modem to provide a backup command data path to a remote ISX 5312/5314 as shown in
Figure 1-8.
N M I
P
ort
N M I
P
ort
M od em
P STN
N M S B acku p Com m and P ath
Eth ernet Eth ernet
N M S P rim ary Com m and P ath
T-1
N etw ork
ISX 5 312/5 314 ISX 5 312/5 314
L A N L A N
M od em
Figure 1-8. Dial Modem Providing a Backup Command Data Path to a Remote
ISX 5312/5314
Alarm Reporting
To alert you to potential problems in the network, the ISX 5312/5314 reports a wide
variety of alarm conditions. The conditions are simultaneously reported and displayed
on the ISX 5312/5314's front panel. You can select the time interval before a T-1 line
alarm is reported, and you can independently enable or disable each DSU and T-1 line
alarm. You can also set the ISX 5312/5314 to sound a beeper when it detects an alarm
condition. Alarm conditions are also reported to the T7 manager or to SNMP manager
as traps (if the network is so equipped). The ISX 5312/5314 stores the reported alarms
in memory.