In a message dated 12/7/99, Jeongmin Cho writes: > I am looking for a PSTN requirements for Indonesia. > > Also, I need to information such as return loss,impedance,DTMF tone level, > sending level, and so on. >
Jeongmin: I have a bad copy of "Telecommunication Specification STEL D-001-1996, Version 3" for modem approvals in Indonesia. About all that I can make out is that return loss must exceed 12 dB for 300-600 Hz, and 15 dB for 600-3400 Hz. The remaining specifications are incomplete. Maybe you could use the above document number to pursue getting a complete and up-to-date copy. Overall, I think the requirements in Indonesia are similar to those in Singapore and Malasia. Some of my previous designs have been approved in Indonesia using the same configuration that was used for Singapore and Malasia. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc.
