[asterisk-biz] Billing?

[Alex Balashov]

Alistair Cunningham wrote:

> There are SS7 solutions for Asterisk but we would not recommend 
> them as 3rd party gateways are more mature.

Not just that, but as there is no MGCP or H.248/MEGACO support, it is 
impossible to control intermachine trunks (bearers) over a separate ISUP 
link that is not connected to the physical host into which the bearer 
channels go.  Thus, the limit of how many IMTs can be taken is the limit 
of how many T1s can physically be plugged into a single Asterisk host.

Because Asterisk does not separate the signaling and bearer plane in 
this manner, this makes Asterisk SS7 support relatively useless in the 
contexts in which it is most often asked about.  It is only good for 
low-density private SS7 access, and I can't see a compelling reason to 
use it over PRI.

Also, Asterisk SS7 only supports ISUP - no TCAP, so no LNP, CNAM dips, 
etc.  In the US, that's going to make it completely useless for telco 
interconnection.  How useless?  About 95% useless, as >= 95% of the rate 
centers in the country are now under number pooling, not just 
10,000-block NANPA assignments.  The LRN is virtually required to route 
in this situation.  Plus any direct end-office trunks or sector tandem 
connections and, well, yeah.

-- Alex

-- 
Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671