80 CHAPTER 4: CONFIGURING PATH BUILDER S330/S310 MODULES , PORTS , AND APPLICATIONSThe T1 (DS1)/E1 UNI Configuration menu lists the following additional read-onlyparameters:Group — The number of the group to which the ports belong.Tx LID — Transmit link identification. This should match the Rx LID of the remoteend IMA device. Tx LID is displayed only if the port is part of an IMA group.Rx LID — Receive link identification. This should match the Tx LID of the remoteend IMA device. Rx LID is displayed only if the port is part of an IMA group.Operation Link Delay — Operation link delay synchronized, in msec. This is theactual link delay used to synchronize the IMA links. Operations LDS is displayedonly if the port is part of an IMA group.6 Select [9] Previous Menu to return to the T1/E1 UNI Configuration menu.7 Repeat steps 3 and 4 for any other T1/E1 ports that you want to configure.Configuring UNI andIMA GroupsYou can map two to four T1/E1 ports into an IMA group, thereby creating alogical, inverse-multiplexed, high-speed link. The PathBuilder S330 also supportsUNI groups.The PathBuilder S310 switch features a single T1/E1 port and supports a UNIgroup on this port; it does not support IMA groups. The PathBuilder S330supports up to four UNI or IMA groups using any combination of ports on thestandard T1/E1 UNI with IMA interface and (if installed) the optional four-port IMAexpansion module.Expansion slot 9 shares the same queue (queue 1) as the group 1 IMA UNI;therefore, if an expansion module (DS3/E3 UNI or four-port IMA) is installed inslot 9, the system deletes group 1 and all corresponding virtual circuits on startupand generates an information only alarm. Furthermore, you cannot add group 1 ifan expansion module is installed in slot 9—either in the chassis or in the database.If you enter a card type for slot 9 via the List Card menu, group 1 and thecorresponding virtual circuits are not deleted until the system is restarted.Adding UNI GroupsTo set up a UNI group:1 From the Configuration Management menu, select [1] Manage Card to open theList Card menu, shown earlier in Figure 60.2 From the List Card menu, select [3] DS1 UNI to open the T1 (DS1) UNI or E1 UNIConfiguration menu, shown earlier in Figure 67.Table 5 Bit Error Rates Translated into Total Number of ErrorsBitErrorRate(BER)Total Errors in1 secondTotal Errors in1 MinuteTotal Errors in2 MinutesTotal Errors in5 MinutesTotal Errors in15 Minutes10-4 15 900 1800 4500 1350010-5 1.5 90 180 450 135010-6 0.15 9 18 45 13510-7 0.015 1 2 5 13
