Temporary network Failure

[fsiddi]

Dear Friends,
i have installed MM 5.2 single server configuration (MAS, MSS, WCWSO) and update with service pack 16 .... with CM 5.2.1.... i have configured it but when i dial Voice mail number( vm huntgroup extension 7000) it gives me following traces....
time data

19:20:11 active station 1241 cid 0x2c2
19:20:11 G711MU ssff ps:20
rgn:1 [172.20.1.101]:2740
rgn:1 [172.20.0.11]:5028
19:20:12 call-forwarding
19:20:12 term hunt-group 99 cid 0x2c2
19:20:12 call-forwarding *887000
19:20:12 term trunk-group 99 cid 0x2c2
19:20:12 call-forwarding *887000
19:20:12 route-pattern 99 preference 1 cid 0x2c2
19:20:12 seize trunk-group 99 member 2 cid 0x2c2
19:20:12 Calling Number & Name NO-CPNumber NO-CPName
19:20:12 SIP>INVITE sip:[email protected] SIP/2.0
19:20:12 Setup digits 7000
19:20:12 Calling Number & Name 1241 Network Engin


LIST TRACE

time data
19:20:14 SIP>INVITE sip:[email protected] SIP/2.0
19:20:46 denial event 1192: Temporary failure D1=0x8b26 D2=0x229
19:20:46 idle trunk-group 99 member 2 cid 0x2c2
19:20:46 denial event 2291: Rem off-net covpt is busy D1=0x8b26 D2=0x2c2
19:20:46 no answer station 1241 cid 0x2c2
19:20:46 coverage-path 0 point 0 cid 0x2c2
19:20:50 idle station 1241 cid 0x2c2
19:24:45 TRACE COMPLETE station 1241 cid 0x0



please suggest me..thanks