Howto:2N - VoiceBlue Lite - Testreport

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Contents

Summary

In the first place 2N VoiceBlue Lite is a GSM to SIP Gateway with a support up to 4 SIM cards. There also basic Mobility Extension features implemented and may in addition to main functions are used in parallel. A software for mobile phones to assist Mobile Extension features is also available.

A fix for the minor bug from vendor is pending.

General Information

  • Product name: Mobility Extension
  • Vendor: 2N
  • Version: 2.00n
  • Firmware: 02.07.35i19 (first test done with older Firmware 02.07.35b02)
  • innovaphone Firmware: V7 hotfix5

Current test state

The tests for this product have been completed.

Testing of this product has been finalized October 6th, 2009.

Configured Scenario

Image:2N Mobility Extenson Testing Scenario.png


Description

Mobile Extension Features

In addition to the SIP registration at the PBX as a GSM Gateway, it is possible to define Mobile Extensions registered via SIP separately to the particular user object on the PBX. In this way the calls to the user object on the PBX also signalled to ther mobile phone and the calls from the users mobile phone, dialed via 2 stage dialing, are placed to the PBX via this SIP registration.

Access to the fixed-phone-like functions from any registered mobile phone(in addition to the PBX DTMF-Features) via DTMF Features of the GSM GW:

  • call hold/resume
  • swap between the calls
  • transfer
  • blind transfer

Tested Call Flows

Normal user outbound to GSM 
A call from a PBX user routed via LCR to the GSM network via GSM GW
Inbound to normal user 
A call from GSM network to an internal PBX user
Inbound to Mobility Extension user 
A call from any PBX user or from outside the PBX to the Mobility Extension user(One Number)
Mobility Extension to normal user 
A call from mobile phone of the Mobility Extension user via GSM GW into the PBX to an internal PBX user

Important Components

Server Requirements

  • no server components required

Product Setup

Installation & Configuration of the vendor hardware

System parameters 
Set IP address, SIM PIN Number and DTMF codes. Use "+" for the "End of dialing" if you intend to use PBX based DTMF features.
Image:2N VoiceBlue Lite Configuration 01.png
SIP parameters 
"SIP registration expires" must be set to 120s(see minor bugs). Set DTMF RFC2833.
Image:2N VoiceBlue Lite Configuration 02.png
GSM outgouing groups 
Set CLIR to "Disable (CLIP - on)". Our experience is that in Norway Delay for alerting has to be set to 2 seconds. With only one second there is no ringtone.
Image:2N VoiceBlue Lite Configuration 03.png
GSM incoming groups 
Set "Accept incoming calls + dialtone".
Image:2N VoiceBlue Lite Configuration 04.png
Network list 
Set prefixes according your GSM provider.
Image:2N VoiceBlue Lite Configuration 05.png
LCR table 
Configuration example for straightforward LCR.
Image:2N VoiceBlue Lite Configuration 06.png
GSM basic parameters 
Set "Generate busy tone to GSM".
Image:2N VoiceBlue Lite Configuration 07.png
Mobile Extension 
Define PBX User Name under Name, PBX User Number under User and PBX User Password under Password. The parameter Name must be one word without spaces. Password must be configured. Set users mobile phone number under CLIP.
Image:2N VoiceBlue Lite Configuration 08.png

Installation & Configuration of the innovaphone components

The GSM GW is registered on the gatekeeper GW3:

Image:2N VoiceBlue Lite Configuration 09.png

LCR Routing from and into the PBX:

Image:2N VoiceBlue Lite Configuration 10.png


No special configuration in the PBX is required, mobile extension user is registered directly to the user object.

Product Test

SIP Interop Test Results

For more information on the test procedure, please read the following wiki article: SIP Interop Test Description.

Basic Call

calls between mobile phone via GSM GW and innovaphone phones (both directions).

Tested feature Result
call using g711a Yes
call using g711u Yes
call using g723 Nok
call using g729 Yes
Overlapped sending Not supported
Early media channel Yes
Fax using T.38 Not supported
CGPN can be supressed Yes
Reverse Media Negotiaton Yes
Codec Renegotiaton Yes
Long time call possible(>30 min) Not tested, should work(no sessions expired timer)
Voice Quality OK? Yes

Direct Dial In

Tested feature Result
Inbound(GSM GW-> innovaphone) Not supported
Outbound(innovaphone -> GSM GW) Not supported

DTMF

DTMF via RFC2833 is supported and must be activated on the GSM GW. Tested from mobile phone via GSM GW to innovaphone pbx and vice versa.

Tested feature Result
DTMF tones sent to GSM correctly Yes
DTMF tones received from GSM correctly Yes

Hold/Retrieve

Tested between mobile phone via GSM GW and innovaphone phones. Tested in both directions.

Tested feature Result
Call can be put on hold Yes
Held end hears music on hold / announcement from PBX Yes
Held end hears music on hold Yes

Transfer with consultation

innovaphone phone transfers mobile call (via GSM GW) and vice versa. Call returns works only when innovaphone phones transfers call (pbx feature).

Tested feature Result
Call can be transferred Yes
Held end hears music on hold Yes
Call returns to transferring device if the third

Endpoint is not available

Yes

Transfer with consultation (alerting only)

innovaphone phone transfers mobile call (via GSM GW) and vice versa. Call returns works only when innovaphone phones transfers call (pbx feature).

Tested feature Result
Call can be transferred Yes
Held end hears music on hold or dialing tone Yes
Call returns to transferring device if the third

Endpoint is not available

Yes

Blind Transfer

Tested between mobile phone via GSM GW and innovaphone phones in both directions.

Tested feature Result
Call can be transferred Yes
Held end hears dialing tone Yes

Broadcast Group & Waiting Queue

Calls from mobile phone (via GSM GW) to innovaphone pbx.

Tested feature Result
Mobile phone can make a call to a Broadcast Group Yes
Mobile phone can get a call from a Broadcast Group Yes
Mobile phone can make a call to a Waiting Queue Yes
Mobile phone can get a call from a Waiting Queue Yes
Announcement if nobody picks up the call Yes


Mobility Features available via DTMF on ViceBlue Lite

Call Hold

Default DTMF code 7*.

Put on hold with *7, retrieve with 9#.

Transfer

Default DTMF Code <Number>#

  • Call form mobile to GSM GW
  • Dial 101#
  • 101 accepts the call
  • Dial 7*
  • Dial 102#
  • 102 accepts the call
  • Hang up
  • 101 and 102 are connected

Blind Transfer

Default DTMF Code #<Number>#

  • Call form mobile to GSM GW
  • Dial 101#
  • 101 accepts the call
  • Dial 7*
  • Dial #102#
  • 102 alerting
  • Hang up manually (9# doesnt work)

Folow Me

Enable/disable calls on user object from PBX to GSM.


SMS at No Answer

Enable/disable SMS via GSM to the number of mobile phone.

Mobility Features available via PBX DTMF Features

A DTMF Digit # is used on the GSM GW to provide the end of dialing as default seting, but it also used in the PBX DTMF Feature Object.

Solution 1 (used for tests)
Change or disable "End of dialing" Digit to "+" and reduce the "Timeout for entering DTMF" on GSW GW.
Solution 2 
Change PBX DTMF Features to use * instead of #.


Tested feature Result
Enable/Disable CFs Yes
Pickup Group Yes
Park/Unpark Yes
Call Completion Busy Yes
Join Group Yes

Minor Bugs

No spaces in the username of Mobile Extension allowed
PBX User Object field Name must be without spaces, in order to be able to register the Mobile Extesion from 2n VoiceBlue Lite. The space is not escaped according RFC 3261 (19.1.4 URI Comparison) : should be One%20Number, but is One Number. Therefore registration is possible, but further SIP interop is broken(e.g. calls to busy subscribers, see the next Bug).
No busy tone to Mobile Extension 
if the PBX user is busy and is called by the Mobile Extension user, the call is just terminated without busy tone. If the username of Mobile Extension include a space, the call is terminated with 403 Forbidden by the PBX, instead to be terminated with 486 Busy Here.

Fixed in Version 02.07.35i19

Wrong SIP To-tag after 407
The SIP tag in "To:" Header is broken after 407 Proxy Authentication Required was sent from the PBX. Affects call transfer from Mobile Extension to internal user. Workaround: remove password on PBX User Object.

Solved by workaround

SIP Registeration Timeout 
The default Registration Timeout of 600 sec. for the SIP Registration is not updated when the PBX defines another timeout in 200 OK after REGISTER. Workaround in the configuration of 2n VoiceBlue Lite: set register timeout to 120 manually.
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