|Article ID: 1528|
What are the DTE Leads for the HSSI Port on the T3SU 300 and OSU 300?
Q: What are the DTE Leads for the HSSI Port on the T3SU 300 and OSU 300?
|Abbreviation||Meaning||Purpose and Configuration|
|TA||Terminal Available||Asserted by the DTE to indicate readiness to transmit data.|
|CA||Communications Equipment Available||Asserted by the T3SU 300 or OSU 300 to indicate readiness to transmit data.|
|TM||Test Mode||Asserted by the T3SU 300 or OSU 300 when either the network or the port is being tested|
|LA||Loopback circuit A||The condition reflected by this lead is dependent on the LB lead. See table below.|
|LB||Loopback circuit B||The condition reflected by this lead is dependent on the LA lead. See table below.|
|LC||Loopback circuit C||Asserted by the unit to request a loopback from the DTE.|
LA and LB Leads
|Off||Off||No Test (normal)|
|On||Off||Local Line loopback|
|Off||On||Remote Line loopback|
|On||On||Local DTE loopback|