Chapter 4: Remote Management HTTP and SNMP
firmware) and purchase an alphanumeric “factory upgrade key” which is entered at the HTTP management
screen.
Chapter 5: Operating Modes and Configuration
Telecom
There are several, low-level configuration settings for TDM ports; though, typically, the default settings are
appropriate:
●
E3 vs DS3
●
cable length (for long DS3 runs only)
●
unframed or M13 or C-Bit (for DS3 only)
●
CRC length (none/16/32)
●
scrambling on/off
●
fractional or full-rate utilization
Use a “DS3” configuration setting for North America, Japan, and South Korea; otherwise, “E3” speed.
The cable length setting will transmit a slightly stronger signal on long DS3 coax runs.
Circuit Clock Speed
In the event of incoming clock loss when the monitor is insert inline with the WAN circuit, the transmit
clock will automatically switch to a locally generated DS3/E3 clock source.
The receive clock speeds are shown at the bottom of the unit's HTTP management statistics page to assist
timing diagnosis.
DS3 Circuit ID PMDL
DS3 Path Maintenance Data Link (PMDL) identification messages associated with C-Bit framed DS3 links
may be received. Circuit ID messages convey human-readable, configurable, physical location information
of the DS3 source equipment. PMDL Circuit ID messages facilitate confirmation of the data source when
presented with a pair of unlabeled BNC cables.
Port to Port Packet Flow
LAN-to-LAN
Full LAN-to-LAN packet flow can be enabled on a unit, if desired. This might be useful if it was desirable
for incoming SFP management packets to exit the copper LAN Port 2 of the unit, along with the packets
carrying TDM data, in order to be recorded. LAN-to-LAN unidirectional flow for monitoring may also be
configured if desired.
LAN-to-LAN should be used cautiously to avoid overloading bandwidth limitations of the unit.
Loopback
C-Bit T3 TDM ports will not respond to FEAC loopback requests.
LAN Port Settings
The hardware for two LAN ports exist on all Monitors shipped; however, entry-level models ship with only
100Base-TX mode on LAN Port 2 enabled. See upgrades section of this manual to enable these additional
features if required:.
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