Section 2 Engineering Guidelines Total Access 850 System Manual26 © 2004 ADTRAN, Inc. 64203376L1-1BBank Controller Unit (1200373L1 and 1200373L2)The following is operational information pertaining to the Bank Controller Unit when used with theTotal Access 850 system.Faceplate LEDsThe faceplate Network LEDs labeled T1 NETWORK and T1 FRACTIONAL provide status informationusing a color coded message format. Table 1 gives a description of all faceplate LEDs for the BCU whenused with the Total Access 850 system.DIP-Switch SettingsThe Total Access 850 BCU can be provisioned from DIP-switches (S1) mounted on the PCB, or throughscreen menus accessed via the faceplate ADMIN interface. Basic T1 provisioning, clock source, and CSUloopback options are found on the DIP-switch panel. Table 2 gives DIP-switch provisioning information.DIP-switch S1 must be provisioned without the BCU in the chassis. Once the BCU is installed, any softwareprovisioning made will override the DIP-switch settings. If the BCU is withdrawn and reinserted(power-cycled), the software options remain in effect. If a DIP-switch setting is changed while the BCU iswithdrawn, the new DIP-switch setting takes effect. If none of the DIP-switch settings were changed, theunit will be provisioned for the last software settings.Table 1. BCU Faceplate LEDsFor these LEDs... This color light... Indicates that...Network/Frac T1 OFF there is no power to the system.RED the unit is in Red Alarm (meaning the T1 is down, notconnected, or framing is improperly configured).YELLOW the unit is receiving Yellow Alarm (meaning the far endunit is in Red Alarm).Solid GREEN the unit is functioning normally.Blinking GREEN the network T1 interface is in Test mode.Table 2. BCU DIP-Switch S1 OptionsSwitch Function DescriptionS1-1 Framing Format Enables either Extended Superframe Format (ESF) orSuperframe Format (SF). This option must be configuredidentically with all other T1 network equipment on this circuit.ON* SFOFF ESF
