Typically T1 (american) signaling ss7 links run at 56kbps instead of 64kbps.
If your switch can run 64kbps links over a T1 timeslot, than the only
remaining variable is ITU versus ANSI ISUP. They are incompatible
(different message formats due to different network address sizes and
other details).
We use ITU ISUP all over the place without trouble. If the switch can do
64kbps links and ITU ISUP, then you should be able to use all existing
E1 direct connection samples (without STP), except for the obvious E1=31
timeslots while T1=24 timeslots difference..
ANSI might work. I won't go there because I have zero experience with
ANSI SS7/ISUP (stability wise).
With 2 T1 and a single signaling link it should allow for 47 voice
channels and one signaling link.
Search for libss7 ansi 56kbps for the most difficult scenario. But if
you can do ITU ISUP + 64kbps links, I would suggest that instead.
We hardly see people talking about ANSI ISUP setups on this list, so it
could be far less stable (at least it seems to get less usage).
On 12/07/11 16:25, Matt wrote:
In this case, our supplier is ourselves. We have a DMS100, but the
switch guy is someone other than myself - I am the IP guy.
So basically if I understand you properly, I should be able to do the
SS7+T1 and get proper operation, provided the configuration on both
sides is right.
On Wed, Dec 7, 2011 at 1:06 PM, Marcelo Pacheco<marc...@m2j.com.br> wrote:
If the DMS100 switch can talk signalling directly with Asterisk, without an
STP, it should be possible to use a single timeslot for ss7 signalling, so
with 2 T1 you could have 47 voice calls and one signalling channel. This is
common with E1 setups. Also with E1 its common for a timeslot to be
statically switched over to an STP (semi permanent call), allowing for
access to the signaling network without a dedicated physically separate
signaling link, but that's not usual in T1 land.
But what you ask is technically possible... However its important to
PROPERLY LEARN SS7 terms to be able to communicate with your supplier.
SS7 is a CARRIER LEVEL PROTOCOL. However people insist on winging it without
proper training.
Its like trying to become a backbone internet provider without properly
learning inter and intra network routing protocols (like BGP and OSPF).
If you knew the general SS7/ISUP knowledge, you could quickly find the
information you're looking for on Google.
PS: I live in E1 land... I'm just quoting information from the top of my
head. I have no need for T1+SS7. E1+SS7 is a little simpler with Asterisk
than T1+SS7 due to 56kbps data links, ANSI ISUP/SS7 and some other quirks.
Good luck. You'll need it.
On 12/07/11 14:47, Matt wrote:
If I were to get a 2 span T1 card for Asterisk... and connect it to a
Nortel DMS100... can I run call traffic over the T1 and run SS7
signaling FOR the T1 over the other port?
Is there documentation on doing this anywhere?
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