[cisco-nas] ISDN calls not making it to NM-6DM

[Tom Storey]

Played around with this a bit more, and Ive configured up my Se1/0:15
interface with PPP et al, almost matches the Group-Async interface, so
should be right.

When the ISDN data call establishes (what looks to be successfully) I see
both ends start TXing PPP LCP packets, which is a good sign, but neither
end is receiving anything from the other side.

Pitty I cant wireshark the B channels to see whats going back and forth. :-P

On 31 January 2015 at 00:08, Mark Johnson (mljohnso) <mljohnso at cisco.com>
wrote:

>  Yeah, the DM’s are only going to terminate analog calls.  As Josh says
> (long time, Josh!), configure the PRI (or use Legacy DDR or Dialer
> Profiles) and you should be good.
>
>  mark
>
>   From: joshd <jduffek at gmail.com>
> Date: Friday, January 30, 2015 at 3:52 PM
> To: Tom Storey <tom at snnap.net>
> Cc: Mark Johnson <mljohnso at cisco.com>, "cisco-nas at puck.nether.net" <
> cisco-nas at puck.nether.net>
> Subject: Re: [cisco-nas] ISDN calls not making it to NM-6DM
>
>     If you just want to make it work, you can configure your IP stuff on
> the serial1/0:15 interface and the call should terminate there.  ISDN to
> ISDN like.
>
>  Not sure how you would simulate a real analog modem type call from the
> 1841 side with what you have.
>
>  I could be wrong though, been a while...
>
>  jd.
>
> On Fri, Jan 30, 2015 at 5:32 PM, Tom Storey <tom at snnap.net> wrote:
>
>> Hi Mark, did not expect such a quick response!
>>
>>  Indeed it is originating from the 1841 as 8890.
>>
>>  I also re-configured the 1841 to do DoV, where the bearercap changed to
>> 0x8090A3, and this was also seen as the incomming bearercap on the 3825.
>>
>>  I was under the impression from my reading that the NM-xDM could also
>> terminate ISDN data calls, or have I got that wrong?
>>
>>  Cheers!
>>
>> On 30 January 2015 at 23:27, Mark Johnson (mljohnso) <mljohnso at cisco.com>
>> wrote:
>>
>>>  A bearer cap of 0x8890 means the call is digital, not analog, so the
>>> call is not being passed to a modem.  Your emulating network in between
>>> must be mucking with the bearer cap (check out debug on the 1841 to verify
>>> that it’s not originating at 8890).
>>>
>>>  mark
>>>
>>>   From: Tom Storey <tom at snnap.net>
>>> Date: Friday, January 30, 2015 at 3:13 PM
>>> To: "cisco-nas at puck.nether.net" <cisco-nas at puck.nether.net>
>>> Subject: [cisco-nas] ISDN calls not making it to NM-6DM
>>>
>>>   Hi everyone.
>>>
>>>  Playing around with some old hardware in a lab, trying to get some
>>> ISDN calls originated from an 1841 with a WIC-1B-S/T-V3 to be answered on a
>>> 3825 with a NM-6D and NM-CE1T1-PRI.
>>>
>>>  Heres my config:
>>>
>>>  controller E1 1/0
>>>  pri-group timeslots 1-6,16
>>> !
>>> interface Serial1/0:15
>>>  no ip address
>>>  encapsulation ppp
>>>  isdn switch-type primary-net5
>>>  isdn incoming-voice modem 64
>>>  isdn bchan-number-order ascending
>>> !
>>> interface Group-Async0
>>>  ip unnumbered Loopback0
>>>  ip nat inside
>>>  ip virtual-reassembly in
>>>  encapsulation ppp
>>>  peer default ip address pool dialup
>>>  async mode interactive
>>>  no keepalive
>>>  ppp authentication chap callin
>>>  group-range 2/0 2/5
>>> !
>>> line 2/0 2/5
>>>  modem InOut
>>>  autoselect ppp
>>> !
>>>
>>>  And heres what I see when an ISDN call comes in:
>>>
>>>  *Jan 30 23:31:24.963 UTC: ISDN Se1/0:15 Q931: RX <- SETUP pd = 8
>>>  callref = 0x0183
>>> Bearer Capability i = 0x8890
>>> Standard = CCITT
>>> Transfer Capability = Unrestricted Digital
>>> Transfer Mode = Circuit
>>> Transfer Rate = 64 kbit/s
>>> Channel ID i = 0xA98381
>>> Exclusive, Channel 1
>>> Calling Party Number i = 0x80, '0733944124'
>>> Plan:Unknown, Type:Unknown
>>> Called Party Number i = 0x80
>>> Plan:Unknown, Type:Unknown
>>> *Jan 30 23:31:24.963 UTC: ISDN Se1/0:15 Q931: Received SETUP  callref =
>>> 0x8183 callID = 0x01E5 switch = primary-net5 interface = User
>>> *Jan 30 23:31:24.971 UTC: %ISDN-6-CONNECT: Interface Serial1/0:0 is now
>>> connected to 0733944124 N/A
>>> *Jan 30 23:31:24.971 UTC: ISDN Se1/0:15 Q931: TX -> CALL_PROC pd = 8
>>>  callref = 0x8183
>>> Channel ID i = 0xA98381
>>> Exclusive, Channel 1
>>> *Jan 30 23:31:24.971 UTC: ISDN Se1/0:15 Q931: TX -> CONNECT pd = 8
>>>  callref = 0x8183
>>> Channel ID i = 0xA98381
>>> Exclusive, Channel 1
>>> *Jan 30 23:31:24.979 UTC: ISDN Se1/0:15 Q931: RX <- CONNECT_ACK pd = 8
>>>  callref = 0x0183
>>>
>>>  So as far as I can tell the call comes in and establishes fine, but
>>> even with "debug modem" and a couple of other debugs on, I dont see any
>>> activity regarding connection to a modem. When I dial in from an analogue
>>> modem it works just fine.
>>>
>>>  FWIW I am using the 3825 as a PSTN simulator as well. The 1841 is
>>> connected to a VIC2-2BRI-NT/TE emulating network, and a dialpeer connects
>>> calls to a VWIC2-2MTF-E1 which is also emulating network and is connected
>>> to the NM-CE1T1-PRI.
>>>
>>>  Wondering if any one can provide any pointers to help me out. Am I
>>> missing something obvious?
>>>
>>>  Let me know if you require more information.
>>>
>>>  Thanks
>>> Tom
>>>
>>
>>
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