I wasn’t able to get much out of babytel, beyond the fact that I was, apparently, sending options which is why I’m not getting 200 OK.

How can I, generally speaking, ping/telnet or otherwise test the connection to get more data?

A connection to this peer directly from a softphone, Jitsi, works fine.

linux-k7qk*CLI>
linux-k7qk*CLI> sip show peer testcarrier

* Name : testcarrier
Secret :
MD5Secret :
Remote Secret:
Context : from-trunk
Subscr.Cont. :
Language : en
AMA flags : Unknown
Netborder CPD: No
Transfer mode: open
CallingPres : Presentation Allowed, Not Screened
FromUser : 1234567890
FromDomain : sip.babytel.ca Port 5060
Callgroup :
Pickupgroup :
MOH Suggest : default
Mailbox :
VM Extension : asterisk
LastMsgsSent : 32767/65535
Call limit : 0
Max forwards : 0
Dynamic : No
Callerid : “” <>
MaxCallBR : 384 kbps
Expire : -1
Insecure : port,invite
Force rport : Yes
ACL : No
DirectMedACL : No
T.38 support : No
T.38 EC mode : Unknown
T.38 MaxDtgrm: 4294967295
DirectMedia : No
PromiscRedir : No
User=Phone : No
Video Support: No
Text Support : No
Ign SDP ver : No
Trust RPID : No
Send RPID : Yes
TrustIDOutbnd: Legacy
Subscriptions: Yes
Overlap dial : No
Outb. proxy : nat5.babytel.ca
DTMFmode : rfc2833
Timer T1 : 500
Timer B : 32000
ToHost : sip.babytel.ca
Addr->IP : 198.38.7.11:5060
Defaddr->IP : (null)
Prim.Transp. : UDP
Allowed.Trsp : UDP
Def. Username: 1234567890
SIP Options : (none)
Codecs : 0x4 (ulaw)
Codec Order : (ulaw:20)
Auto-Framing : No
Status : UNREACHABLE
Useragent :
Reg. Contact :
Qualify Freq : 60000 ms
Sess-Timers : Accept
Sess-Refresh : uas
Sess-Expires : 1800 secs
Min-Sess : 90 secs
RTP Engine : asterisk
Parkinglot :
Use Reason : No
Encryption : No

linux-k7qk*CLI>

thanks,

Thufir