I try to connect ISDN PRI from quad Chann E1 AS5300 to DS1 Lucent PBX For Days, I can not make the Signalling up. On PBX they have parameter such as 1. Country Protocol : 1 - 22, or ETSI 2. Protocol Version : a or b 3. Interface Companding : alaw or mulaw 4. Idle Code : 8 bit : 0x00 until 0xFF I try to use isdn switch-type primary-net5, and on PBX ETSI. The question is there is no explanation on Cisco about protocol version, interface companding, idle code of the E1 port on router. Anybody can help me ? thanks -ivan- ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]