Monolithic device that integrates 32 T1/J1/E1 shorthaul line interface circuits. Software selectable between E1 and T1 mode, in groups of 16 links. Links 1-16 and 17-32 can be configured for either T1 or E1 mode. Meets or exceeds T1/J1 and E1 shorthaul network access specifications including ANSI T1.102, T1.403, T1.408, AT&T TR 62411, ITUT G.703, G.704 as well as ETSI 300- 011, CTR-4, CTR-12, and CTR-13. Provides encoding and decoding of B8ZS, HDB3, and AMI line codes.