Belkin F5D5230-F Guía de usuario descargar pdf (Pagina 15)

Porta SIP

System Concepts

• C wishes to call A. So he dials A’s phone number (since C is in the

US, he dials it using the North American format, 2027810003).

• The call is routed through the telecom network to gateway GW-

NY-01. When the incoming call arrives at the gateway (1), it is

processed there in exactly the same way as a normal PSTN->SIP

call: the number is transformed, the call is authorized in the billing

(2), and the timer starts to measure the maximum call time

allowed, based on A’s current balance (3).

• The call is sent to PortaSIP (4).

• PortaSIP receives the INVITE, but without authorization

information. So the PortaSIP server performs authorization in the

billing based on the IP address, and also requests billing-assisted

routing (5).

• PortaBilling recognizes that the destination is an account with

follow-me services enabled, and produces a special list of routes:

o If the follow-me mode chosen is “When unavailable”, then a

direct route to the account’s SIP UA is included as the first

route in the list, with a default timeout.

o A list of follow-me numbers is produced. If the current time

falls outside the specified period for a certain number, it is

removed from the list.

o If the follow-me order is “Random”, then the list of phone

numbers is shuffled.

o The maximum call duration is calculated for each follow-me

number, based on the balance and rates for the called account

(A).

o The resulting list of routes is produced and sent back to

PortaSIP (6).

• PortaSIP tries the first route (7); if the call is not connected within

the timeout interval, it moves to the next route (8), then to the

next one (9), until either the call is put through or no more routes

are left.

• If such a call was completed to follow-me number R, two CDRs

will appear i90

• n the system: one for the call C->A (charged per the incoming

rates for A) and the other for C->R (charged per the outgoing

rates for A).

• If the call did not originate in the PSTN network, but rather from

user B’s SIP UA, two CDRs will likewise be generated. B will be

charged for call B->A, while A will be charged for call B->R.

Note that the follow-me service is not recursive. Thus A can forward calls

from his SIP phone to B's SIP phone, but the call will only go directly to

B's SIP phone. If B has set up forwarding to his mobile phone, this

forwarding will not be used, in order to prevent excessive routing and

routing loops.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 88 89

Comentarios a estos manuales

Sin comentarios

Belkin F5D5230-F Guía de usuario Pagina 15

Comentarios a estos manuales

Relacionado con productos y manuales para Redes Belkin F5D5230-F