Thanks to you all for the support.
I change the dial method from manual to inbound_man and I am able to dial out manually but not with dial next number for which I will look at the lead list. However, other agents are not able to make calls at all even though they can call from the inbound campaign. Below is the log.
[Dec 6 11:39:35] Connected to Asterisk 13.38.2-vici currently running on dialer01 (pid = 14819)
[Dec 6 11:39:40] > 0x7f9614017a80 -- Strict RTP learning after remote address set to: 10.10.191.30:4020
[Dec 6 11:39:40] -- SIP/120-0000000e answered
[Dec 6 11:39:40] -- Executing [8600054@default:1] MeetMe("SIP/120-0000000e", "8600054,F") in new stack
[Dec 6 11:39:40] -- Created MeetMe conference 1020 for conference '8600054'
[Dec 6 11:39:40] -- <SIP/120-0000000e> Playing 'conf-onlyperson.gsm' (language 'en')
[Dec 6 11:39:40] > 0x7f9614017a80 -- Strict RTP switching to RTP target address 10.10.191.30:4020 as source
[Dec 6 11:39:41] == Manager 'sendcron' logged off from 127.0.0.1
[Dec 6 11:39:45] > 0x7f9614017a80 -- Strict RTP learning complete - Locking on source address 10.10.191.30:4020
[Dec 6 11:40:01] == Manager 'sendcron' logged on from 127.0.0.1
[Dec 6 11:40:01] == Manager 'sendcron' logged off from 127.0.0.1
[Dec 6 11:40:02] == Manager 'sendcron' logged on from 127.0.0.1
[Dec 6 11:40:02] -- Called 8600054@default
[Dec 6 11:40:02] -- Executing [8600054@default:1] MeetMe("Local/8600054@default-000000ef;2", "8600054,F") in new stack
[Dec 6 11:40:02] -- Local/8600054@default-000000ef;1 answered
[Dec 6 11:40:02] -- Executing [90886004178@default:1] AGI("Local/8600054@default-000000ef;1", "agi://127.0.0.1:4577/call_log") in new stack
[Dec 6 11:40:02] -- AGI Script Executing Application: (EXEC) Options: (Set(_CAMPCUST=4002))
[Dec 6 11:40:02] -- <Local/8600054@default-000000ef;1>AGI Script
agi://127.0.0.1:4577/call_log completed, returning 0
[Dec 6 11:40:02] -- Executing [90886004178@default:2] Dial("Local/8600054@default-000000ef;1", "DAHDI/g0/0886004178,,Tto") in new stack
[Dec 6 11:40:02] WARNING[36179][C-0000024b]: app_dial.c:2589 dial_exec_full: Unable to create channel of type 'DAHDI' (cause 0 - Unknown)
[Dec 6 11:40:02] -- No devices or endpoints to dial (technology/resource)
[Dec 6 11:40:02] -- Executing [90886004178@default:3] Hangup("Local/8600054@default-000000ef;1", "") in new stack
[Dec 6 11:40:02] == Spawn extension (default, 90886004178, 3) exited non-zero on 'Local/8600054@default-000000ef;1'
[Dec 6 11:40:02] WARNING[36179][C-0000024b]: func_hangupcause.c:140 hangupcause_read: Unable to find information for channel
[Dec 6 11:40:02] -- Executing [h@default:1] AGI("Local/8600054@default-000000ef;1", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----16-----CHANUNAVAIL---------------)") in new stack
[Dec 6 11:40:02] == Manager 'sendcron' logged on from 127.0.0.1
[Dec 6 11:40:02] -- Called 58600054@default
[Dec 6 11:40:02] -- Executing [58600054@default:1] MeetMe("Local/58600054@default-000000f0;2", "8600054,Fmq") in new stack
[Dec 6 11:40:02] -- Local/58600054@default-000000f0;1 answered
[Dec 6 11:40:02] -- Executing [8309@default:1] Answer("Local/58600054@default-000000f0;1", "") in new stack
[Dec 6 11:40:02] -- Executing [8309@default:2] Monitor("Local/58600054@default-000000f0;1", "wav,20211206-114002_0886004178") in new stack
[Dec 6 11:40:02] -- Executing [8309@default:3] Wait("Local/58600054@default-000000f0;1", "3600") in new stack
[Dec 6 11:40:02] -- <Local/8600054@default-000000ef;1>AGI Script
agi://127.0.0.1:4577/call_log--HVcauses ... ----------) completed, returning 0
[Dec 6 11:40:02] == Spawn extension (default, 8600054, 1) exited non-zero on 'Local/8600054@default-000000ef;2'
[Dec 6 11:40:02] WARNING[36180][C-0000024a]: func_hangupcause.c:140 hangupcause_read: Unable to find information for channel
[Dec 6 11:40:02] -- Executing [h@default:1] AGI("Local/8600054@default-000000ef;2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----16--------------------)") in new stack
[Dec 6 11:40:02] -- <Local/8600054@default-000000ef;2>AGI Script
agi://127.0.0.1:4577/call_log--HVcauses ... ----------) completed, returning 0
[Dec 6 11:40:03] == Manager 'sendcron' logged off from 127.0.0.1