Verilink AS4000 (34-00244) Product Manual - Manual (Page 17)

Overview
Verilink AS4000 User Manual 1-7
• AUI—An Ethernet LAN port labeled AUI provides a DB-15 pin
AUI connection.
• Term Ports—Two console ports, labeled T ERM , provide RJ-11
telco ports for terminal connections.
• Phone Line—An RJ-11 port labeled P HONE L INE supports a
modem connection.
Redundant
Power Supplies
The AS4011 can be equipped with dual load-sharing power
supplies. Either supply can operate with a full load. The
redundancy can be implemented with two AC supplies or two DC
supplies. Each power supply module has its own independent AC
and DC inlet.
Timing
Timing is critical to the proper operation of a carrier channel
network. All of the equipment in a point-to-point network must
refer to a single digital master clock. The System Manager
maintains a shelf timing table which designates the current timing
master from one of the designated primary, secondary, or tertiary
sources. The timing table is configured by the user. Choose
different modules within the node as timing controllers.
An AS4000 node must use a common timing source since data is
passed between the modules across the shelf midplane. Certain
application modules (
Table 1-2 ) can be selected as the timing
source. The System Manager monitors the timing source and
displays the new source (as indicated by the shelf timing table) if
the original source fails.
Table 1-2 Application Module Timing capabilities
Application Module Timing Sources
System Manager
• Internal clock
Quad DS-1 Module
• Internal clock
• Network port
• External source
T3 Module
• Internal clock
• Network ports
• External source
Quad DS-1 with xDSL Module
• Internal
• Network ports
Quad Port Sync Data Module
• Port 1
OCU-DP Module
Test Access Module (TAM)