following way all the information elements except for the 34 platform identifier 34 and 34 user handoff information 34 are the same as those proposed by is 634 section 2 3 1 6 of the tr 45 document 34 msc bs interface for public 800 mhz call processing and supplementary services pn 3361 2 ballot version the 34 platform identifier 34 and 34 user handoff information 34 information element may have the same format as in the 34 handoff request 34 message to support dca and multi user platforms requesting multi channel services some additional is 634 standard messages require modification messages exchanged during mobile origination 34 cm service request 34 and mobile terminated call 34 paging request 34 and 34 paging response 34 which have a 34 mobile identifier 34 information element in its original form in is 634 may be used with the 34 platform identifier 34 and 34 user information 34 elements instead of the 34 mobile identifier 34 information element messages exchanged during inter bs handoff 34 handoff required 34 34 handoff request ack 34 and 34 handoff command 34 which have a 34 mobile identifier 34 information element in its original form in is 634 may be used with the 34 platform information 34 elements instead of the 34 mobile identifier 34 information element advantages of the invention.