[asterisk-users] Xorcom T1 to PRI

[Carlos Chavez]

On 2015-09-24 17:08, Jeff LaCoursiere wrote:
> Hi,
> 
> I have a client that has a 24 channel voice T1 that I have been using
> e&m signalling over for a number of years.  The local telco finally
> got an ISDN switch and wants to move them to PRI.  I didn't see this
> as a big problem - I've done a few others on this particular Caribbean
> island without issues, but this would be the first time with a Xorcom
> unit involved.
> 
> We tried to do it tonight and failed.  I suspect there is an issue at
> their central office where they patched the line away from an old
> dms-100 and to the new ISDN switch - the tech said he couldn't see
> anything at the line layer, though I showed no alarms.  Regardless,
> something odd happened that I am hoping for some advice on.  We
> reverted to the T1 and will try again next week.
> 
> The odd bit is this - lsdahdi showed all 24 channels as "T1" instead
> of "PRI".  The output of lsdahdi at another site where I had already
> done this conversion (which uses a Sangoma card) looks like this:
> 
> root at astsouth:/etc/dahdi# lsdahdi
> ### Span  1: WPT1/0 "wanpipe1 card 0" (MASTER) ESF/B8ZS
>   1 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   2 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   3 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   4 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   5 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   6 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   7 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   8 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>   9 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  10 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  11 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  12 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  13 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  14 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  15 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  16 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  17 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  18 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  19 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  20 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  21 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  22 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  23 PRI        Clear       (In use) (EC: WANPIPE_HWEC - INACTIVE)
>  24 PRI        Hardware-assisted HDLC  (In use) (EC: WANPIPE_HWEC - 
> INACTIVE)
> 
> Bah, the scrollback has already erased the output from the box in
> question, but essentially it showed the same as above with "T1" in the
> second column for all channels instead of "PRI".
> 
> They both had identical system.conf, which looks like this:
> 
> loadzone=us
> defaultzone=us
> span=1,1,0,esf,b8zs
> bchan=1-23
> echocanceller=mg2,1-23
> hardhdlc=24
> 
> In fact the *only* things I changed from the old system.conf tonight
> was swapping "e&m=1-24" for "bchan=1-23" and adding the "hardhdlc=24".
>  The old (now functioning) system.conf looks like this:
> 
> # Span 1: XBUS-00/XPD-00 "Xorcom XPD [usb:X1067719].1: T1" (MASTER) 
> B8ZS/ESF RED
> loadzone    = us
> defaultzone    = us
> span=1,1,0,esf,b8zs
> e&m=1-24
> echocanceller=mg2,1-24
> 
> So what about system.conf would cause lsdahdi to show "T1" instead of
> "PRI" in column two?  Just trying to head off any additional problems
> once they get their patching sorted out.
> 

The issue is probably with the wanpipe configuration and not with DAHDI 
or Asterisk.  Run the wanpipe_cfg script again and make sure you change 
all necessary settings from E&M to ISDN PRI.

-- 
Telecomunicaciones Abiertas de México S.A. de C.V.
Carlos Chávez
dCAP #1349
+52 (55)9116-91161