возможны ли sip звонки без extensions ?

имею 2х юзверей (они friend, то есть и user и peer)
Org1 и Org2

например таких

trixbox1*CLI> sip show user org1 load
trixbox1*CLI>

* Name : org1
Secret : <Not set>
MD5Secret : <Not set>
Context : default
Language :
AMA flags : Unknown
Transfer mode: open
MaxCallBR : 384 kbps
CallingPres : Presentation Allowed, Not Screened
Call limit : 0
Callgroup :
Pickupgroup :
Callerid : "Org1" <>
ACL : No
Sess-Timers : Accept
Sess-Refresh : uas
Sess-Expires : 1800 secs
Sess-Min-SE : 90 secs
Codec Order : (none)
Auto-Framing: No

trixbox1*CLI> sip show peer org1 load .

* Name : org1
Realtime peer: Yes, cached
Secret : <Not set>
MD5Secret : <Not set>
Context : default
Subscr.Cont. : <Not set>
Language :
AMA flags : Unknown
Transfer mode: open
CallingPres : Presentation Allowed, Not Screened
Callgroup :
Pickupgroup :
Mailbox :
VM Extension : asterisk
LastMsgsSent : 32767/65535
Call limit : 0
Dynamic : Yes
Callerid : "Org1" <>
MaxCallBR : 384 kbps
Expire : -1
Insecure : no
Nat : RFC3581
ACL : No
T38 pt UDPTL : No
CanReinvite : Yes
PromiscRedir : No
User=Phone : No
Video Support: Yes
Text Support : No
Trust RPID : No
Send RPID : No
Subscriptions: Yes
Overlap dial : Yes
DTMFmode : rfc2833
Timer T1 : 500
Timer B : 32000
ToHost :
Addr->IP : (Unspecified) Port 0
Defaddr->IP : 0.0.0.0 Port 5060
Transport : UDP
Def. Username:
SIP Options : (none)
Codecs : 0xc7f9fff (g723|gsm|ulaw|alaw|g726|adpcm|slin|lpc10|g729|speex|ilbc|g726aal2|g722|slin16|jpeg|png|h261|h263|h263p|h264|mpeg4|red|t140)
Codec Order : (none)
Auto-Framing : No
100 on REG : No
Status : Unmonitored
Useragent :
Reg. Contact :
Qualify Freq : 60000 ms
Sess-Timers : Accept
Sess-Refresh : uas
Sess-Expires : 1800 secs
Min-Sess : 90 secs