asterisk users - Apr 2006 - suggestions on an IP T1 to TDM T1 gateway solution

Can anyone offer up a suggestion on a reliable and cost effective
customer premise hardware setup to be able to take an inbound IP T1 and
deliver a PRI interface to a remote office?

 

Trying to reduce the amount of hardware required to implement this,
right now we use a Cisco router to take the IP T1 in on a serial port
and then we go Ethernet to a slimmed asterisk box with a single port T1
card, and from there to the PBX PRI port.

 

Seems like we should be able to skip the router and build an asterisk
solution with 2 T1 ports, one for the data T1 and one to the PBX (PRI),
and then an Ethernet connection to the LAN/Firewall.

 

Maybe there is a non asterisk solution that works well with asterisk?

 

The other end is asterisk as well.

 

Anyone done this successfully on a single device?

 

 

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IAX or SIP trunks have similar requirements, correct? You still need an
IP link as transport. Granted IAX might be more efficient.

 

Another thought is to simply use a Telco provided point to point T1 to
extend an open port on an existing PRI card in the asterisk server to
the remote PBX PRI interface. Anyone every done it this way?  The need
to pass other data over the T1 is not really an issue, it would only be
a backup data route anyways, primary use is voice.

 

________________________________

From: Ryan Amos [mailto:ramos@finetooth.com] 
Sent: Friday, April 07, 2006 10:00 AM
To: Damon Estep
Subject: RE: [Asterisk-Users] suggestions on an IP T1 to TDM T1 gateway
solution

 

You still need a CSU/DSU card. There are plenty of data CSU/DSUs out
there, I would suggest eBay. You may be able to find a hardware CSU/DSU
card somewhere. The Cisco router is undoubtedly cheaper (you can pick up
a used 2524 with a T1 card for $50; PCI cards are $500+) and that is how
many places still do their data T1s.

 

I much prefer this setup, actually, as it is easier to break the T1 off
and use it for other things (just plug it into a VLANned switch and go
to town.) You're not really reducing your points of failure either way,
you've just moved it from hardware to software (kernel drivers; plus
zaptel does not behave well when the machine is under load.)

 

Just curious, if you have a PRI and you're just talking to asterisk on
both sides, why not use IAX trunks?

 

________________________________

From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Damon
Estep
Sent: Friday, April 07, 2006 8:15 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [Asterisk-Users] suggestions on an IP T1 to TDM T1 gateway
solution

 

Can anyone offer up a suggestion on a reliable and cost effective
customer premise hardware setup to be able to take an inbound IP T1 and
deliver a PRI interface to a remote office?

 

Trying to reduce the amount of hardware required to implement this,
right now we use a Cisco router to take the IP T1 in on a serial port
and then we go Ethernet to a slimmed asterisk box with a single port T1
card, and from there to the PBX PRI port.

 

Seems like we should be able to skip the router and build an asterisk
solution with 2 T1 ports, one for the data T1 and one to the PBX (PRI),
and then an Ethernet connection to the LAN/Firewall.

 

Maybe there is a non asterisk solution that works well with asterisk?

 

The other end is asterisk as well.

 

Anyone done this successfully on a single device?

 

 

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