> > Telco (Lucent SS7) E1 line (crc4) <=> * box + E100P, T100P, Zplex <=> > > analog phones and ATA186 (SIP and MGCP) SS7 is very very different from PRI and uses a different HDLC frame. SS7 is not supported by Asterisk. Did you mean a PRI comming from a "SS7" switch or did you mean the signalling was actually SS7? Mark