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Reference Guide 4-7
Applications Voice Modules
4.2.6 T1-E1 Conversion Application
The Digital Access and Cross-connect System (DACS) capabilities and the signaling and
companding conversion features of the Integrated Access System can be used to provide
gateway functionality between a DS1 transport network and an E1 transport network. See
Figure 4-3 for an illustration of this capability.
Figure 4-3.IAD using T1/E1 Conversion
Depending on the application, the signaling conversion can be set by the user to ITU-to-ANSI;
ANSI-to-ITU or None. Similarly, the companding can be set by the user to A-Law-to-
µ
-Law;
µ
-LAW-to-A-Law or None. As shown in the figure above, each WAN card must be configured
with one port for DSX1 and one for CEPT. A cross connection circuit must be made for each
DS1 to E1 DSO re-assignment. Time Slots 0 and 16 cannot be used on the E1 link. Time slot
0 is used for timing and time slot 16 is used for Channel Associated Signaling (CAS). TS16
is available in data-only applications.
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