Évaluations - 3, GPA: 4.3
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Facilité d'utilisation
The options include the following •D4 •D1D 3. In-band Loopback: This option is used to enable or disable ANSI T1.403 in-band loopbacks. DS1 Circuit Provisioning The DS1 Circuit Provisioning menu items are used to provision the DS1 circuit. Options include the following: 1. Circuit Select: This option is used to select the circuit to be provisioned. The options include the following: • Circuit A • Circuit B 2. Operation State: This option is used to enable or disable the operation state of circuits A and B. 3. Line Buildout: This option is used to select the line length or the attenuation loss of the selected T1. Option include the following: • 0-133 feet • 133-266 feet • 266-399 feet • 399-533 feet • 533 - 655 feet •0 dB • –7.5 dB •–15 dB • –22.5 dB 4. Line Code: This option is used to select the line coding type. Options include the following: • B8ZS: This option is used to enable Bipolar Eight Zero Substitution (B8ZS), which allows for Clear Channel operation for the T1 carrier system. This option must be configured identically with all other T1 network equipment on this circuit. • AMI: This option is used to enable Alternate Mark Inversion (AMI). This option must be configured identically with all other T1 network equipment on this circuit. 5. Framing: This option is used to select the framing format for the selected T1. This setting must be configured identically with all other T1 network equipment on this circuit. Options include the following: • ESF: This option is used to enable Extended Superframe Format. • SF: This option is used to enable Superframe Format. Timing Provisioning The Timing Provisioning menu items are used to establish the clock mode and primary and secondary timing source. Options include the following: 1. Clock Mode: Options include Non-revertive or Revertive clock mode. This decision should be based on whether a primary and secondary timing source are available. In the event that the primary timing source is lost, the Dual LIU will automatically switch to the secondary timing source. Issue 4, May 2006 61180009L1-5D • • • Non-revertive: This option allows the unit to remain on the secondary timing source. If Nonrevertive is chosen and the secondary timing source becomes active due to a primary timing source failure and the secondary source fails, the unit will switch to the primary timing source if it has become available. 2. Primary Timing Source: This option is used to select the primary timing source for the T1s. Options include the following: •Local • Loop A • Loop B •CLK 3. Secondary Timing Source: This option is used to select the secondary timing source for the T1s. Options include the following: •Local • Loop A • Loop B •CLK This timing source will become the current timing source if the primary timing source is lost. If both timing sources are lost, the timing reverts to local. As timing sources are regained, the current timing source reverts to the primary or secondary timing source as they become available. Time Slot Assignment Used to assign time slots when the bank is in manual map mode. This option allows time slots to be assigned by T1-A, T1-B, or by the card slot. Status Screen The Dual LIU Status screen is used to quickly view the status of the loops, the provisioned settings for each T1, the bank mode, M.T.A. status, the settings for primary and secondary timing, and the status of the timing source. Alarms Menu The Dual LIU Alarms menu is used to enable or disable the external clock alarms. These alarms should be enabled when a timing source is connected to the external clock pins. Test Menu The Dual LIU Test menu is used to perform loopbacks, select which T1 is monitored by the front panel monitor jacks, or reset the Dual LIU. Performance Monitoring Menu The Dual LIU collects and stores the Performance Monitoring (PM) information statistics for each of the T1s. This PM information is stored in non-volatile memory and is accessible through the Performance Monitoring menu. A brief description of the various options follows: 1. Daily: This option is used to display daily counts of multiple performance monitoring statistics. 2. Far-End Daily: This option is used to display daily counts of multiple performance monitoring statistics associated with the far-end. 3. Qtr-Hour: This option is used to display counts of performance monitoring statistics in seven 15minute intervals. 4. Far-End Qtr-Hour: This option is used to display counts of performance monitoring statistics in seven 15-minute intervals associated with the far- end. 5. Daily Threshold: This option is used to set threshold points for daily counts and enable or disable an alarm that would occur when this threshold is exceeded. 6. FE Daily Threshold: This option is used to set threshold points for far-end daily counts and enable or disable an alarm that would occur when this threshold is exceeded. 7. Qtr-Hour Threshold: This option is used to set threshold points for 15-minute counts and enable or disable an a...