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

Mon Feb 2 17:02:43 EST 2015

Hey Josh.

Yeah, just O CONFREQs from both sides.

I do see input crc/frame errors on Se1/0:0 on the 3825, and also on Di0 on
the 1841. No errors on any of the other PRI/BRI interfaces in between
though.

Tried swapping the VIC2-2BRI in the 3825 which didnt help, but I dont have
a spare WIC-1B to test with at the moment.

On 2 February 2015 at 13:51, joshd <jduffek at gmail.com> wrote:

> So just O CONFREQs on each side then?  You could look at the "sh int
> se1/0:x"/b-channel, maybe you're getting input errors or something?
>
>
>
> On Sat, Jan 31, 2015 at 1:38 PM, Tom Storey <tom at snnap.net> wrote:
>
>> 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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>>>
>>>
>>
>
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