Hi Victor & Treg This certainly does happen in ISDN, for example in S Korea and Taiwan. It also happens in Hong Kong but this is because they allow competition in all forms as long as the equipment meets ITU-T recs.
My guess is that this is probably reflected at the higher bit rates such as E1 and T1 but I cannot be 100% certain. These countries do have reasonable PTT and approvals body web sites so a little time spent surfing could reveal the answers. Hope this helps as a starting point, best regards: Bill Ellingford Motion Media Technology Ltd (UK) -----Original Message----- From: Victor Thang Van [SMTP:[email protected]] Sent: 15 November 1999 22:05 To: [email protected] Cc: [email protected] Subject: T1/E1 and u-law/A-law A curious question: I always see u-law coding is used for T1, and A-law's for E1. Anybody knows if u-law 's been ever used in E1, and A-law is used in T1. If so, what are the countries? Thx Victor
