[asterisk-ss7] Can't get two ss7 links going redundantly

[ss7 newb]

Hi.

I built a small lab to test asterisk-ss7.

Two boxes with quad-t1 cards,  .. with two T1s on each box connected using a
crossover T1 cable.

BChan 1-23, SS7 Signaling=24
BChan 25-47, SS7 Signaling=48

If I specify sigchan=24, then sigchan=48 I'm not able to make calls if I
unplug the T1 carrying sigchan=24

If I specify sigchan=48, then sigchan=24, I'm not able to make calls if I
unplug the T1 carrying sigchan=48.

When I unplug the first T1, I get..
[May 27 16:04:25] ERROR[23430]: chan_dahdi.c:11545 ss7_linkset: Alarm on
link!
[May 27 16:04:25] WARNING[23430]: chan_dahdi.c:11596 ss7_linkset: MTP2 link
down (SLC 0)

or, if I unplug the second T1, it says (SLC 1)

What I would like to do, Is have two or more signaling channels over two or
more T1s.

I *should* be able to unplug one of the two signaling channels, and still
have calls flow between boxes, but that doesn't seem to be happening.


Any suggetions would be appreciated.

FYI; I've tried.
sigchan = 24
sigchan = 48

cicbeginswith = 1
channel = 1-23
cicbeginswith = 25
channel = 25-47

AND
sigchan = 24
cicbeginswith = 1
channel = 1-23

sigchan = 48
cicbeginswith = 25
channel = 25-47

AND
cicbeginswith = 1
channel = 1-23
sigchan = 24

cicbeginswith = 25
channel = 25-47
sigchan = 48


Lab is as follows.

BOX(A)
Asterisk SVN-trunk-r194138
libss7 version: 1.0.2
Quad T1 Card

BOX(B)
Asterisk SVN-trunk-r194138
libss7 version: 1.0.2
Quad T1 Card


Cross Over T1 cable between BOX(A)-T1(1) ---- BOX(B)-T1(1)
Cross Over T1 cable between BOX(A)-T1(2) ---- BOX(B)-T1(2)

======================
Both Boxes with:
span=1,1,0,esf,b8zs
bchan=1-23
dchan=24
span=2,0,0,esf,b8zs
bchan=25-47
dchan=48

======================
BOX(A) chan_dahdi.conf
[trunkgroups]

[channels]
language=en
context=ss7

group=1
callgroup=1
signalling=ss7
ss7type = ansi
ss7_called_nai=dynamic
ss7_calling_nai=dynamic
networkindicator=national

;ss7_internationalprefix = 00
;ss7_nationalprefix = 0
;ss7_subscriberprefix =
;ss7_unknownprefix =
;ss7_explictacm=yes

linkset = 1
pointcode = 3
adjpointcode = 2
defaultdpc = 2

sigchan = 24
sigchan = 48

cicbeginswith = 1
channel = 1-23
cicbeginswith = 25
channel = 25-47

======================
BOX(B) chan_dahdi.conf
[trunkgroups]

[channels]
language=en
context=ss7

group=1
callgroup=1
signalling=ss7
ss7type = ansi
ss7_called_nai=dynamic
ss7_calling_nai=dynamic
networkindicator=national

;ss7_internationalprefix = 00
;ss7_nationalprefix = 0
;ss7_subscriberprefix =
;ss7_unknownprefix =
;ss7_explictacm=yes

linkset = 1
pointcode = 2
adjpointcode = 3
defaultdpc = 3

sigchan = 24
sigchan = 48

cicbeginswith = 1
channel = 1-23
cicbeginswith = 25
channel = 25-47
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