Nokia 6090 AT Command Set 19+CGMM Request ME Model IdentificationThis command displays the ME model identification. TA and ME are in the samephysical entity, the response of the command +GMM is identical. (GSM 07.07)Syntax:AT+CGMM Display model identification.Response is Nokia 6090 - GSM900 FixedMobile PhoneAT+CGMM=? OK+CGMR Request ME Revision IdentificationThis command displays the ME revision identification. Response is the Nokia 6090SW version, HW version is not supported. TA and ME are in the same physical entity,the response of the command +GMR is identical. (GSM 07.07)Syntax:AT+CGMR Display revision identification.AT+CGMR=? OK+CGSN Request ME Serial Number IdentificationThis command displays the ME serial number, or the IMEI. TA and ME are in thesame physical entity, the response of the command +GSN is identical. (GSM 07.07.)Syntax:AT+CGSN Display serial number.AT+CGSN=? OK+CHLD Call Related Supplementary ServicesControls call hold, multiparty and explicit call transfer supplementary serviceoperations similarly as defined in GSM 02.30 (GSM 07.07)Syntax:AT+CHLD=[]AT+CHLD=? Show supported values.Response is +CHLD: (list of supported's). values:0 release waiting call or held calls;1 release active calls and accept other(waiting or held) call;1x release active call x;2 active calls on hold and accept other(waiting or held) call;2x active multiparty call on hold except call x;3 add held call to multiparty call;4 connect held and active (or MO alerting)call with each other (locally both calls aredisconnected).