[hints]

 exten => 4800,hint,Sip/4800
 exten => 4801,hint,Sip/4801
 exten => 4802,hint,Sip/4802
 exten => 4803,hint,Sip/4803
 exten => 4804,hint,Sip/4804
 exten => 4805,hint,Sip/4805
 exten => 4806,hint,Sip/4806
 exten => 4807,hint,Sip/4807
 exten => 4808,hint,Sip/4808
 exten => 4809,hint,Sip/4809
 exten => 4810,hint,Sip/4810
 exten => 4811,hint,Sip/4811
 exten => 4812,hint,Sip/4812
 exten => 4813,hint,Sip/4813
 exten => 4814,hint,Sip/4814
 exten => 4815,hint,Sip/4815
 exten => 4816,hint,Sip/4816
 exten => 4817,hint,Sip/4817
 exten => 4818,hint,Sip/4818
 exten => 4819,hint,Sip/4819
 exten => 4820,hint,Sip/4820

etc.

====================================================

[sip]  ;default primary extension.

 include => houston                 ;These are my office phones.
 include => voicemail               ;all voicemail is here.
 include => outbound                ;all outbound is here.
 include => conference              ;conference bridges are here.
 include => barge                   ;call monitoring
 include => temprecording           ;call recording.
 include => hints                   ;presence.