SRST and reserver one license for operator

Question

Does SRST have a feature which can reserver one for a number , for example operator? The reason being that is say the license we ordered is less than the staff. So we want the call to unregistered phone to be redirected to operator. But we have to ensure operator register first. Thanks

Answer 1

Another way just occurred to me:
Set up an access-list that permits traffic from only the first 24 addresses in your address range to port 2000 on the router:
e.g. your SRST router IP is 192.168.1.254:
access-list 100 permit tcp 192.168.1.0 0.0.0.15 host 192.168.1.254 eq 2000
access-list 100 permit tcp 192.168.1.16 0.0.0.7 host 192.168.1.254 eq 2000
access-list 100 deny tcp 192.168.1.0 0.0.0.255 host 192.168.1.254 eq 2000
access-list 100 permit ip any any
Syntax may be dodgy there but you get the idea...
Then reserve the operator phone an IP in DHCP that is in the range that is allowed port 2000 on the router above. Any phones reserved addresses in that range will be able to register with the router, any phones outside will not be able to.
Aaron