User`s manual

Mediant 1000
H.323 User's Manual 342 Document #: LTRT-83401
14.2 Mediant 1000 Line Testing
The Mediant 1000 features a mechanism that performs tests on the telephone lines
connected to FXS and FXO ports. These tests provide various line measurements. Line
testing is executed via SNMP only (using the acAnalogFxoLineTestTable SNMP table for
FXO and the acAnalogFxsLineTestTable SNMP table for FXS).
Note: The line testing mechanism must only be used for monitoring and never
when there are calls in progress.
The following line tests are available on FXS modules:
 Hardware revision number
 Temperature (above or below limit, only if a thermometer is installed)
 Hook state
 Coefficients checksum
 Message waiting indication status
 Ring state
 Reversal polarity state
 Line current (only on port 0)
 Line voltage between TIP and RING (only on port 0)
 3.3 V reading (only on port 0)
 Ring voltage (only on port 0)
 Long line current (only on port 0)
The following line tests are available on FXO modules:
 Hardware revision number
 Hook state
 Reversal polarity state
14.3 Syslog Support
Syslog protocol is an event notification protocol that enables a machine to send event
notification messages across IP networks to event message collectors - also known as
Syslog servers. Syslog protocol is defined in the IETF RFC 3164 standard.
Since each process, application and operating system was written independently, there is
little uniformity to Syslog messages. For this reason, no assumption is made on the
contents of the messages other than the minimum requirements of its priority.
Syslog uses UDP as its underlying transport layer mechanism. By default, UDP port 514 is
assigned to Syslog, but this can be changed (using the SyslogServerPort parameter).
The Syslog message is transmitted as an ASCII (American Standard Code for Information
Interchange) message. The message starts with a leading ‘<’ ('less-than' character),
followed by a number, which is followed by a ‘>’ ('greater-than' character). This is optionally
followed by a single ASCII space.
The number described above is known as the Priority and represents both the Facility and
Severity as described below. The Priority number consists of one, two, or three decimal
integers.
For example:
<37> Oct 11 16:00:15 mymachine su: 'su root' failed for lonvick on
/dev/pts/8