Operating the DSU4-53550-A2-GB20-40 July 1999Expanded Health and StatusExpanded Health and Status (Expan) only appearsduring automatic dialing. It retrieves Health and Statusinformation for the local DSU after an automatic backupattempt has failed, or when there is a disconnect after asuccessful connection.If the right arrow (→) appears to the right of ExpandedH/S, there is more than one message. Press the key tosee the next message.Subnetwork Health and StatusSubnetwork Health and Status (Subn) displays statusinformation from a DSU’s subnetwork (all DSUs andDBMs assigned to that DSU’s active poll list). Thedownstream network addresses and current statuses arelisted. To page through tributary addresses:• Press the F1 key ( ↑) for the next highest networkaddress.• Press the F2 key (↓) for the next lowest networkaddress.DTE StatusThe DTE status subbranch provides a snapshot statusof the local or remote unit’s external DTE interface.• For the local DSU status, the display is sampledand updated every 2 seconds.• For the remote DSU status, only one set of states isreturned based upon a monitoring period ofapproximately 3 seconds.The DTE interface statuses are displayed in sets. Usethe or key to scroll each set of lead statuses intoview.Circuit QualityCircuit Quality (CircQ) shows the level and quality ofthe signal being received from the network by the DBM.This subbranch is only available for a V.32 DBM.IdentityIdentity (ID) displays a listing of the DSU’s model andserial numbers, the equipment installed (DBM orTDM/Flex), software/firmware versions, the networkaddress, the DDS or DSU’s rate, the DBM’s rate, andwhether the TDM/Flex is currently activated. Procedure1. Press the key to scroll ID into view.2. Press the function key (F1, F2, or F3) directlybelow the selection. One field at a time isdisplayed.3. Press the key to display the information, onedisplay (screen) at a time.Table 4-1 lists the Identity information provided aboutthe DSU and its equipment.Terminal PowerTerminal Power (TPwr) displays the status of theconnected DTE’s EIA-232 and V.35 interface (connector).The DSU checks the state of the RTS lead to determinewhen the DTE is ON.• When the voltage is less than –3V or greater than+3V for both the EIA-232 and V.35 interfaces,— The second line displays On if power isdetected.— The second line displays Off if no power isdetected.