AltiGen comm ACM 5.1 - Manual (Page 430)

Appendix A: E1-R2 and E1 ISDN PRI Installations
416 AltiWare ACM 5.1 Administration Manual
c. In the next Board Configuration window, select E1 as the configure type, and
click OK.
Important: When changing from E1 to T1, then back to E1, channel group properties will
be reset to default values. It is important to make sure the channel group
properties are configured properly. Follow the steps below to re-check your
settings for the physical layer and data link layer.
2. In the Board Configuration window, double-click the channel group to open the
Channel Group Configuration dialog box.
Figure 4. Physical Layer
Consult your CO for “Frame Type,” “Line Code,” or “Zero Code Suppression.”
Do not check the System Clock Master check box because the CO is a clock pro-
vider, and our system is synchronized to the CO. If all configurations are correct,
the status should be shown as “OK,” as in Figure 4.
3. Click the Protocol button in the Channel Group Configuration dialog box to open the
Protocol Configuration window.