92 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 features a single T1/E1 port and does not support IMA orUNI groups.The DS3/E3 UNI shares the same queue (Queue 1) as the Group 1 IMA UNI;therefore, if a DS3/E3 expansion card is installed in slot 9, the system deletesGroup 1 and all corresponding VCs on startup and generates an information onlyalarm. Furthermore, you cannot add Group 1 if a DS3/E3 expansion card isinstalled—either in the chassis or in the database. If you change the card type forslot 9 to DS3/E3 via the List Card menu, Group 1 and the corresponding VCs arenot deleted until the system is restarted.Adding UNI GroupsTo set up a UNI group, follow these steps:1 From the Configuration Management menu, select [1] Manage Card to display theList Card menu, shown earlier in Figure 51.2 From the List Card menu, select [3] DS1 UNI to open the T1 (DS1) UNI or E1 UNIConfiguration menu, shown earlier in Figure 58.3 From the T1 (DS1) UNI or E1 UNI Configuration menu, select [3] GroupConfiguration to display the Group menu, shown in Figure 61.Table 22 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
