Current Situation
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Location B PowerPoint PPT Presentation


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Current Situation. PBX. PSTN. PBX. Location A. Location B. Direct link. PBX. Location C. Transient situation. 112. 211. 111. PBX. PSTN. 212. PBX. 113. 213. Location A. Location B. Direct link. 311. PBX. Location C. 312. 313. Transient situation: Phone to phone.

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Location B

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Location b

Current Situation

PBX

PSTN

PBX

Location A

Location B

Direct

link

PBX

Location C


Location b

Transient situation

112

211

111

PBX

PSTN

212

PBX

113

213

Location A

Location B

Direct

link

311

PBX

Location C

312

313


Location b

Transient situation: Phone to phone

112

211

111

PBX

PSTN

212

PBX

113

213

Location A

Location B

Direct

link

311

Call 112

PBX

Location C

312

Call 213

313


Location b

Transient situation: PC to phone

112

211

111

PBX

PSTN

212

PBX

113

213

Location A

Location B

Direct

link

Call 213

311

PBX

Location C

312

313


Location b

Evolved situation

PBX

PSTN

Location A

Location B

Direct

link

Location C


Location b

Setup call

Call <#CLI>

Network topology & status

1. Find origin

2. Find destination

3. Select best

available route

VPN Features. Efficient call routing

Virtual Private Network


Location b

Setup call

Orig.

3375111

Call 111

Dialling rules

Called #

Translated #

11?

337511?

22?

336522?

23?

425545?

VPN Features. Abbreviated dialling

Virtual Private Network


Location b

Setup call

Orig.

3375111

Call 4441524

Filtering rules

Called #

Origin

Allow?

444????

11?

3224???

???

Rest

1??

VPN Features. Call filtering (I)

Virtual Private Network


Location b

Denied access

to 3224524

Your telephone is

not allowed to

call that number

Call 3224524

Filtering rules

Called #

Origin

Allow?

444????

11?

3224???

???

Rest

1??

VPN Features. Call filtering (II)

Virtual Private Network


Location b

VPN Features. Unified billing

PSTN

111 - 113 - 07:20

111 - 214 - 02:20

314 - 214 - 10:20

314 - 113 - 15:19


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