Sip.conf context:
[9254784865]
type=peer
host=dynamic
context=dialtone-broadband
username=9254784865
secret=9254784865
disallow=all
allow=ulaw
canreinvite=no

Trace: debug=4, verbose=255
pts-pbx*CLI> 
<-- SIP read from 192.168.0.58:5060: 
REGISTER sip:pts-pbx SIP/2.0
Via: SIP/2.0/UDP 192.168.0.58;branch=z9hG4bKacCHcwRtO
Max-Forwards: 70
From: <sip:9254784865@mp108-1>;tag=1c2759329893
To: <sip:9254784865@mp108-1>
Call-ID: 181569012jKfH@192.168.0.58
CSeq: 1 REGISTER
Contact: <sip:9254784865@192.168.0.58;user=phone>;expires=180
Supported: em,timer,replaces,path
Allow: REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUBSCRIBE,UPDATE
Expires: 180
User-Agent: Audiocodes-Sip-Gateway-MP-108 FXS/v.4.40.200.371
Content-Length: 0


--- (13 headers 0 lines)---
Using latest request as basis request
Sending to 192.168.0.58 : 5060 (non-NAT)
Transmitting (no NAT) to 192.168.0.58:5060:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.0.58;branch=z9hG4bKacCHcwRtO
From: <sip:9254784865@mp108-1>;tag=1c2759329893
To: <sip:9254784865@mp108-1>
Call-ID: 181569012jKfH@192.168.0.58
CSeq: 1 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY
Contact: <sip:9254784865@192.168.1.45>
Content-Length: 0


---
Transmitting (no NAT) to 192.168.0.58:5060:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.0.58;branch=z9hG4bKacCHcwRtO
From: <sip:9254784865@mp108-1>;tag=1c2759329893
To: <sip:9254784865@mp108-1>;tag=as2c71b27d
Call-ID: 181569012jKfH@192.168.0.58
CSeq: 1 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY
Contact: <sip:9254784865@192.168.1.45>
WWW-Authenticate: Digest realm="asterisk", nonce="14ed711b" 
Content-Length: 0


---
Scheduling destruction of call '181569012jKfH@192.168.0.58' in 15000 ms
pts-pbx*CLI> 
<-- SIP read from 192.168.0.58:5060: 
REGISTER sip:pts-pbx SIP/2.0
Via: SIP/2.0/UDP 192.168.0.58;branch=z9hG4bKacIvQsMhB
Max-Forwards: 70
From: <sip:9254784865@mp108-1>;tag=1c2759329893
To: <sip:9254784865@mp108-1>
Call-ID: 181569012jKfH@192.168.0.58
CSeq: 2 REGISTER
Authorization: Digest username="9254784865",realm="asterisk",nonce="14ed711b" ",uri="sip:pts-pbx",algorithm=MD5,response="878d5c1169db99d5386b20eea9f8be7b"
Contact: <sip:9254784865@192.168.0.58;user=phone>;expires=180
Supported: em,timer,replaces,path
Allow: REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUBSCRIBE,UPDATE
Expires: 180
User-Agent: Audiocodes-Sip-Gateway-MP-108 FXS/v.4.40.200.371
Content-Length: 0


--- (14 headers 0 lines)---
Using latest request as basis request
Sending to 192.168.0.58 : 5060 (non-NAT)
Transmitting (no NAT) to 192.168.0.58:5060:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.0.58;branch=z9hG4bKacIvQsMhB
From: <sip:9254784865@mp108-1>;tag=1c2759329893
To: <sip:9254784865@mp108-1>
Call-ID: 181569012jKfH@192.168.0.58
CSeq: 2 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY
Contact: <sip:9254784865@192.168.1.45>
Content-Length: 0


---
Oct 22 17:36:57 NOTICE[25740]: chan_sip.c:5710 check_auth: stale nonce received from '<sip:9254784865@mp108-1>'
Transmitting (no NAT) to 192.168.0.58:5060:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.0.58;branch=z9hG4bKacIvQsMhB
From: <sip:9254784865@mp108-1>;tag=1c2759329893
To: <sip:9254784865@mp108-1>;tag=as2c71b27d
Call-ID: 181569012jKfH@192.168.0.58
CSeq: 2 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY
Contact: <sip:9254784865@192.168.1.45>
WWW-Authenticate: Digest realm="asterisk", nonce="1e9ad6a6" 
Content-Length: 0


---
Scheduling destruction of call '181569012jKfH@192.168.0.58' in 15000 ms
pts-pbx*CLI>