[asterisk-biz] Number of hops- Termination

[Alex Balashov]

 From an engineering perspective, the number of political and 
administrative entities intervening in the call path isn't nearly as 
interesting as the network topology.

However, a traceroute - that is, an illumination of Layer 3 hops, and 
indeed, furthermore, merely of those which permit ICMP 
TTL-exceeded-in-transit messages to originate from or pass through them 
- is unlikely to be of any utility whatsoever.  The interesting facts 
about the quality of an ITSP doing termination relate to their physical 
location, peering relationship to various Tier 1 backbones, the 
bandwidth they have to them, and the gear involved.  And all that is 
only relevant if they themselves do SIP access with their underlying 
carriers.  Otherwise, there may be a wealth of TDM network elements 
involved, and in either scenario, plenty of <= Layer 2 elements that 
also have an effect on the conceptual ultimacy that is the "path" or the 
"hops" involved.

What happens to the call beyond the ITSP's handoff to the underlying 
carrier is also of interest, as the topologies of the physical 
interconnected TDM networks that may be used to reach the PSTN are as 
innumerable as the mind can allow.  What happens to the call once it 
goes beyond an incumbent POI (point of interconnect) and to a tandem is 
also germane to the overall question of "hops."

In short, Sandeep, either you need to focus your question more to give 
it more conceptual integrity, else what you appear to be asking for is 
impossible.

Nir Simionovich wrote:

> Alistair Cunningham wrote:
>> Sandeep Kanao wrote:
>>> Just curious, if it is possible to find/figure out number of (server) hops
>>> for any termination provider. Are there 'tools' for asterisk to get this
>>> information?  It would be nice to see the hops and the associated IPs.
>>> Experts, any idea?
>> Try "man traceroute" on your Asterisk machine.
>>
>> Alistair Cunningham
>> +1 888 468 3111
>> +44 20 799 39 799
>> http://integrics.com/
>>
>> _______________________________________________
>> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>>
>> asterisk-biz mailing list
>> To UNSUBSCRIBE or update options visit:
>>    http://lists.digium.com/mailman/listinfo/asterisk-biz
> 
> Alistair,
> 
>    I believe he's referring to the number of carriers a call needs to 
> traverse, till it reaches its final destination - not the actual IP hop 
> count from his gateway to the termination side - that is easy.
> 
>    I don't believe such a tool exists, nor do I believe that such a tool 
> can be built.
> 


-- 
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
Tel    : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (678) 237-1775