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@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$

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$”. 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.

Thanks,

j