Hi, I have a trouble to understand TYPE-IDENTIFIER. How should I encode and decode this (from T38 - Basic Aligned PER): IFPPacket::=SEQUENCE { type-of-msg Type-of-msg, data-field Data-field OPTIONAL } { primary-ifp-packet TYPE-IDENTIFIER.&Type (IFPPacket) } >From the network monitor program, I always see 1 octect, which has the same value as number of octet of IFPPacket. From X.681: TYPE-IDENTIFIER ::= CLASS { &id OBJECT IDENTIFIER UNIQUE, &Type } WITH SYNTAX {&Type IDENTIFIED BY &id} But I cannot understand which syntax the above octet comming from. Is it following the X.691 section, 10.9 General rules for encoding a length determinant? Thanks a lot. __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/