User guide

102 RealCT Direct API Developer Guide
Chapter 4: E1 Networking
Table 20. Protocol File Names
The R2-CCITT protocols are symmetrical. The CO and CPE
transmit identical bit patterns for each line state. Your
application uses the same protocol whether it functions as a
CPE or emulates a CO.
Protocol File name
R2-CCITT r2_ccitt.mto
R2-CCITT (Chinese) r2_china.mto
R2-CCITT (Brazilian) r2_brz.mto
R2-CCITT (Central Europe) r2_eur.mto