Concatenated SMS

Can GR64 send concatenated messages? GR64 AT command manual says “MO Concatenated SMS is not supported” and the GR64 Integrators Manual: “…The maximum length of a text mode SMS message is 160 characters using 7-bit encoding. The wireless modem supports up to six concatenated messages to extend this function. Concatenation is performed by the host application…” How must I send the long message so that it is received as a concatenated message?