3 sip configuration issue

Team, i am using 3 different sip with same provider in my asterisk 11. but only one sip is working other 2 sip not working. if i deactivate my 1st sip, 2nd sip working. i deactivate 2nd sip 3rd sip working. simultaniously i can use only one sip. anyone please suggest what is the issue here.

using centos7 asterisk 11 versions.

[general]
context=trunkinbound ; Default context for incoming calls
allowguest=no ; Allow or reject guest calls (default is yes)
allowoverlap=no ; Disable overlap dialing support. (Default is yes)
;allowtransfer=no ; Disable all transfers (unless enabled in peers or users)
;realm=mydomain.tld ; Realm for digest authentication
bindport=5060 ; UDP Port to bind to (SIP standard port is 5060)
bindaddr=0.0.0.0 ; IP address to bind to (0.0.0.0 binds to all)
srvlookup=yes ; Enable DNS SRV lookups on outbound calls
;domain=mydomain.tld ; Set default domain for this host
;pedantic=yes ; Enable checking of tags in headers,
;tos_sip=cs3 ; Sets TOS for SIP packets.
;tos_audio=ef ; Sets TOS for RTP audio packets.
;tos_video=af41 ; Sets TOS for RTP video packets.
;maxexpiry=3600 ; Maximum allowed time of incoming registrations
;minexpiry=60 ; Minimum length of registrations/subscriptions (default 60)
defaultexpiry=3600 ; Default length of incoming/outgoing registration
;t1min=100 ; Minimum roundtrip time for messages to monitored hosts
;notifymimetype=text/plain ; Allow overriding of mime type in MWI NOTIFY
;checkmwi=10 ; Default time between mailbox checks for peers
;buggymwi=no ; Cisco SIP firmware doesn’t support the MWI RFC
;vmexten=voicemail ; dialplan extension to reach mailbox sets the
disallow=all ; First disallow all codecs
allow=ulaw ; Allow codecs in order of preference
allow=gsm
mohinterpret=default
mohsuggest=default
language=en ; Default language setting for all users/peers
relaxdtmf=yes ; Relax dtmf handling
trustrpid = no ; If Remote-Party-ID should be trusted
sendrpid = yes ; If Remote-Party-ID should be sent
progressinband=no ; If we should generate in-band ringing always
;useragent=Asterisk PBX ; Allows you to change the user agent string
;promiscredir = no ; If yes, allows 302 or REDIR to non-local SIP address
;usereqphone = no ; If yes, “;user=phone” is added to uri that contains
dtmfmode = rfc2833 ; Set default dtmfmode for sending DTMF. Default: rfc2833
;compactheaders = yes ; send compact sip headers.
videosupport=no ; Turn on support for SIP video. You need to turn this on
;maxcallbitrate=384 ; Maximum bitrate for video calls (default 384 kb/s)
callevents=yes ; generate manager events when sip ua
;alwaysauthreject = yes ; When an incoming INVITE or REGISTER is to be rejected,
;g726nonstandard = yes ; If the peer negotiates G726-32 audio, use AAL2 packing
;matchexterniplocally = yes ; Only substitute the externip or externhost setting if it matches
;regcontext=sipregistrations
rtptimeout=60 ; Terminate call if 60 seconds of no RTP or RTCP activity
;rtpholdtimeout=300 ; Terminate call if 300 seconds of no RTP or RTCP activity
;rtpkeepalive= ; Send keepalives in the RTP stream to keep NAT open
;sipdebug = yes ; Turn on SIP debugging by default, from
;recordhistory=yes ; Record SIP history by default
;dumphistory=yes ; Dump SIP history at end of SIP dialogue
;allowsubscribe=no ; Disable support for subscriptions. (Default is yes)
;subscribecontext = default ; Set a specific context for SUBSCRIBE requests
notifyringing = yes ; Notify subscriptions on RINGING state (default: no)
notifyhold = yes ; Notify subscriptions on HOLD state (default: no)
limitonpeers = yes ; Apply call limits on peers only. This will improve
;t38pt_udptl = yes ; Default false
;register => 1234:password@mysipprovider.com
;registertimeout=20 ; retry registration calls every 20 seconds (default)
;registerattempts=10 ; Number of registration attempts before we give up
;externip = 192.168.1.1 ; Address that we’re going to put in outbound SIP
;externhost=test.test.com ; Alternatively you can specify a domain
;externrefresh=10 ; How often to refresh externhost if
localnet=192.168.0.0/255.255.0.0; All RFC 1918 addresses are local networks
localnet=10.0.0.0/255.0.0.0 ; Also RFC1918
localnet=172.16.0.0/12 ; Another RFC1918 with CIDR notation
localnet=169.254.0.0/255.255.0.0 ;Zero conf local network
nat=yes ; Global NAT settings (Affects all peers and users)
canreinvite=no ; Asterisk by default tries to redirect the
;directrtpsetup=yes ; Enable the new experimental direct RTP setup. This sets up
;rtcachefriends=yes ; Cache realtime friends by adding them to the internal list
;rtsavesysname=yes ; Save systemname in realtime database at registration
;rtupdate=yes ; Send registry updates to database using realtime? (yes|no)
;rtautoclear=yes ; Auto-Expire friends created on the fly on the same schedule
;ignoreregexpire=yes ; Enabling this setting has two functions:
;domain=mydomain.tld,mydomain-incoming
;domain=1.2.3.4 ; Add IP address as local domain
;allowexternaldomains=no ; Disable INVITE and REFER to non-local domains
;autodomain=yes ; Turn this on to have Asterisk add local host
;fromdomain=mydomain.tld ; When making outbound SIP INVITEs to
jbenable = yes ; Enables the use of a jitterbuffer on the receiving side of a
jbforce = no ; Forces the use of a jitterbuffer on the receive side of a SIP
jbmaxsize = 100 ; Max length of the jitterbuffer in milliseconds.
jbresyncthreshold = 1000 ; Jump in the frame timestamps over which the jitterbuffer is
jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a SIP
jblog = no ; Enables jitterbuffer frame logging. Defaults to “no”.
qualify=yes ; By default, qualify all peers at 2000ms
limitonpeer = yes ; enable call limit on a per peer basis, different from limitonpeers

#include sip-vicidial.conf

; register SIP account on remote machine if using SIP trunks
; register => testSIPtrunk:test@10.10.10.16:5060
;

register => pilotnumber1@cn.ims.airtel.in::pilotnumber@cn.ims.airtel.in@IP1/pilotnumber
register => pilotnumber2@cn.ims.airtel.in:
:pilotnumber@cn.ims.airtel.in@IP2/pilotnumber
register => pilotnumber3@cn.ims.airtel.in:***:pilotnumber@cn.ims.airtel.in@IP3/pilotnumber

[AIRTEL1]
type=friend
transport=udp
username=
host=IP1
secret=***
port=5060
qualify=1000
nat=force_rport,comedia
;nat=no
insecure=port,invite
insecure=very
fromuser=pilotnumber1@IP1
fromdomain=IP1
defaultexpirey=3600
canreinvite=no
directmedia=no
progressinband=yes
disallow=all
allow=ulaw,alaw
dtmfmode=rfc2833
context=trunkinbound

[AIRTEL2]
type=friend
transport=udp
username=
host=IP2
secret=***
port=5060
qualify=1000
nat=force_rport,comedia
;nat=no
insecure=port,invite
insecure=very
fromuser=pilotnumber2@IP2
fromdomain=IP2
defaultexpirey=3600
canreinvite=no
directmedia=no
progressinband=yes
disallow=all
allow=ulaw,alaw
dtmfmode=rfc2833
context=trunkinbound

[AIRTEL3]
type=friend
transport=udp
username=
host=IP3
secret=***
port=5060
qualify=1000
nat=force_rport,comedia
;nat=no
insecure=port,invite
insecure=very
fromuser=pilotnumber3@IP3
fromdomain=IP3
defaultexpirey=3600
canreinvite=no
directmedia=no
progressinband=yes
disallow=all
allow=ulaw,alaw
dtmfmode=rfc2833
context=trunkinbound

As this is a peer support forum, there is no team.

You will be difficult to support as you are using a version of Asterisk which is way past end of life, and a channel driver that is no longer supported by the official project, and doesn’t implement the features that might help mitigate your problem.

The likely problem is that Asterisk does not receive sufficient information to distinguish between the different endpoints, in which case the fallback, relative to upgrading, is probably to have only one inbound endpoint, and distinguish based on called number (what VoIP users tend to call the DID)..

I would note that the double @s probably mean you are sending technically invalid SIP URIs, and if the provider requires such invalid URIs, that might be a problem when going to a more compliant SIP implementation.

Although not relevant here, you should also review:

type=friend (this is not doing anything useful, compared with host, and is a security risk);

username (not doing anything useful)

nat= (only needed for broken providers)

canreinvite (same as directmedia)

insecure=very (option value has been ignored for many yeas, and was a short cut for the full list you also have)

insecure=port (normally just reduces security, unless your provider is strange)