Zhone Technologies 800, 900, 600 manual Assigning B Channels

Configuring ISDN Features ACS-PRI/BRI Card

6.4.2Assigning B Channels

Choosing the “Bmap” option from the D channel configuration screen of the ISDN card screen brings up the subscreen shown in Figure 6-10.This figure shows a typical “Bmap” screen. It is a detailed map of all the WAN timeslots available to users as potential B channels.

When D channel #1 is placed in the “Configure” mode, the system recognizes the assignment of WAN 1-1, timeslot #24 to this D channel and places it on the Bmap in the proper location. Notice that since all WAN links are T1 interfaces, the Bmap shows the last 7 places with a dash (-) indicating that the timeslot is unavailable for assignment.

Additionally, timeslots that are already in use by other resources (e.g. user ports and cross-connect) are “blocked-out” with the letter “x” in the appropriate WAN timeslot. This letter “x” means that these timeslots are used as DS0s, and thus are not available for use as B channels. In Figure 6-10,timeslots 14-19 on WAN 1-1 and timeslots 4-9 on WAN 1-2 are in use as DS0s and thus are unavailable for assignment.

Figure 6-10. Basic Bmap Screen

6-22 Server Cards