Altigen MAXCS ACC 6.5 Administration Manual page 452

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Figure 1. 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
provider, and the AltiGen system is synchronized to the CO. If all configurations are
correct, the status should be shown as "OK," as in Figure 1.
3. Click the Protocol button in the Channel Group Configuration dialog box to open the
Protocol Configuration window.
Figure 2. Data Link Layer
4. Select E1 CAS as the Span Type, and select the Switch Mode according to your
country in the E1 R2 Setting field, and click OK.
5. In the Trunk Configuration window, click the Trunk Properties button to open the
E1 Channel Configuration window.
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MAXCS ACC 6.5 Administration Manual