Global IP Office Technical Tip 188

Global IP Office Technical Tip 188
IP Office Technical Tip
Tip no:
188
Release Date:
September 27, 2007
Region:
GLOBAL
Verifying IP Office SIP Trunk Operation
IP Office back-to-back SIP Line testing
IP Office Release 4.0 supports SIP trunking. Many Internet Telephony Service Providers
(ITSP) offer SIP service for connectivity but the programming and operation of SIP
trunks can vary greatly between ITSP’s. Improper configuration is the leading cause of
reported issues. To eliminate the IP Office as a source of issues it is recommended to
test the IP Office SIP Line functionality back-to-back, ensuring correct operation of the IP
Office hardware and software. This document details the configuration and programming
to verify SIP Line functionality in back-to-back operation between two IP Offices.
IP Office SIP Trunk back to back Test Network
Extn – 200 range
Extn – 300 range
IP Office - A
IP Office - B
IP 406v2
IP 412
192.168.42.1
192.168.42.2
SIP Trunk 1
SIP Trunk 2
Network
Switch
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Verifying IP Office SIP Trunk Operation................................................................1
IP Office back-to-back SIP Line testing.................................................................1
Equipment Required .............................................................................................3
Configuration of IP Office – A (IP406v2) ...............................................................3
IP Office SIP Trunk Channels License – IP Office - A...........................................3
IP Office System > LAN > Gatekeeper – IP Office - A ..........................................3
IP Office System > LAN > Network Topology – IP Office - A ................................4
Create a new SIP Line – IP Office - A...................................................................4
Configure the SIP Line tab – IP Office - A.............................................................5
Configure the SIP URI tab – IP Office – A (URI - Uniform Resource Identifier) ....7
Configure the ARS (outbound) – IP Office - A ......................................................9
Define a System Short Code – IP Office - A .......................................................10
User Data – SIP tab ............................................................................................11
Define an Incoming Call Route – IP Office - A ....................................................11
Configuration of IP Office – B (IP412).................................................................12
IP412 – SIP Channel License .............................................................................12
IP412 – Gatekeeper Tab.....................................................................................13
IP412 – Network Topology Tab ..........................................................................13
IP412 – SIP Line Tab..........................................................................................14
IP412 – SIP URI Tab ..........................................................................................14
IP412 – SIP ARS Tab .........................................................................................15
IP412 SIP Short Code Tab .................................................................................15
User Data – SIP tab ............................................................................................15
IP412 – SIP Incoming Call Route Tab ................................................................16
Testing and Verifying Operation..........................................................................16
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Equipment Required
Two (2) IP Office’s with Release 4.0.5 (minimum) installed.
Two (2) SIP Trunk Channels License Keys (valid) – one for each IP Office.
One LAN switch.
NOTE 1: IP Office Small Community Network (SCN) operation
Before proceeding, configure the two IP Offices for typical SCN operation using the IP
addresses and extension numbers listed in the diagram. When configured initiate test
calls end to end to verify operation. This step is important to ensure proper configuration
and operation of basic IP networking between the IP Offices necessary before SIP trunk
testing. When successful with this step continue to the SIP configuration section.
Additional detail of SCN configuration is available in the IP Office documentation.
Configuration of IP Office – A (IP406v2):
IP Office SIP Trunk Channels License – IP Office - A
Check that each IP Office License Key for SIP Trunk Channels is VALID. Without a valid
SIP license access to the SIP Line configuration function will not be available.
IP Office System > LAN > Gatekeeper – IP Office - A
Display the IP Office > System > LAN > Gatekeeper tab and ensure the “SIP Proxy
Enable” function is checked and enabled. The System tab displayed below is that of the
IP 406V2 (IP Office – A in the network diagram). Leave, or set as displayed, all other
settings (default shown).
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IP Office System > LAN > Network Topology – IP Office - A
Check the tab immediately to the right of the “Gatekeeper” tab – the Network Topology
settings. This tab may be necessary in the field for the STUN discovery functionality. For
the back-to-back tests configure the tab as displayed below. Additional information
regarding the STUN function is available in the documentation and HELP files for use in
the field.
Create a new SIP Line – IP Office - A
With the SIP Channel licenses valid go to the IP Office configuration tree “Line” section.
Within the Line section right button click and select “New” > “SIP Line”. The IP Office will
automatically assign a Line Number for the new SIP Line. It is recommended if the
default Line number is below 16 this be changed to a Line number high than 16. The
below example has been changed to 16. The change is done in the SIP Line tab
displayed on the next page. In field deployments enter the Line number (if provided) by
the ITSP. The Line number must be a unique line identifier within this IP Office.
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Configure the SIP Line tab – IP Office - A
Creating a SIP Line will display the frame on the next page. This tab sets the basic SIP
protocol settings used to communicate with the SIP service. The settings of these tabs in
the field must be coordinated closely with your ITSP. Continue configuration of the
individual fields as displayed for the back-to-back tests. Additional information is
available in the documentation.
Line Number
Automatically defined by the IP Office when created. This has been changed to “16” per
previous recommendation. This can be changed to match the Line number provided by
the ITSP in field use. The Line number must be unique for this IP Office.
ITSP Domain Name
Internet Telephony Service Provider (ITSP). For the test network “example.com” is
entered as the domain name. In field use you will enter the domain name provided by
the ITSP.
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ITSP IP Address
Enter the IP address of the remote SIP device – 192.168.42.2 - this is the IP address of
IP Office – B (IP412) in the test network. In the field this address will be provided by the
ITSP and represent the SIP device the IP Office will exchange SIP messaging/protocol
with in the ITSP.
The following fields are not used in the tests, they are not required. The fields should be
blank by default, if not, delete the information leaving the fields as displayed above. The
ITSP may require (and will then provide) this information for their SIP service if
necessary. The fields and their use are self explanatory and additional information is
available in the documentation and HELP files.
Registration Required – checked if any of the following fields are required
Primary Authentication Name
Primary Authentication Password
Primary Registration Expiry – by default set to 60
Secondary Authentication Name
Secondary Authentication Password
Secondary Registration Expiry – by default set for 60
In Service
Check that the SIP Line is “in-service” (Default setting).
Use Tel URI
Not used in the tests. This setting is dependant on the ITSP and the SIP service setup. If
required by the ITSP check this field and then change the ITSP Domain Name field from
the Domain Name (example.com) to the telephone number associated with the SIP
service (example 7325551212) received from the provider.
NOTE 2: Be aware that some SIP provider equipment may not currently support the
IETF RFC 3966 Tel URI format standard.
VoIP Silence Suppression
Unchecked by default and unchecked for the test. In the field verify operation and use
with the ITSP.
RE-INVITE Supported
Unchecked by default and unchecked for the test. In the field verify operation and use
with the ITSP and enable if necessary.
Voice Packet Size and Compression Mode
For the test network the compression mode is left at “Automatic select”. The IP Office
will negotiate the codec for voice compression with the remote SIP service. This field
automatically sets the voice packet size to “0” in the display. If the ITSP has defined a
specific codec for use change the “Compression Mode” to the codec specified. Changing
the “Compression Mode” to a specific codec will change the “Voice Packet Size” to the
correct packet size accordingly.
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Network Configuration settings
Layer 4 Protocol
By default set to “UDP”. The other setting available through the pull down menu is
“TCP”. In the field verify either “UDP” or “TCP” port selection and operation with the
ITSP and set accordingly.
Send Port
By default set to “5060”. Several other ports are available through the pull down menu if
necessary and used in coordination with the “Layer 4 Protocol” setting. Generally UDP
port 5060 and TCP port 5061 is used for SIP protocol operation per IETF RFC 3261.
NAT, firewalls and other factors in the ITSP network may dictate use of other ports. In
the field set as necessary in coordination with the ITSP information supplied.
Use Network Topology Info
Select the LAN interface of the IP Office used for SIP communications. In the IP406v2
the interface available is LAN1.
Configure the SIP URI tab – IP Office – A (URI - Uniform Resource Identifier)
This tab is available and used with the SIP Line configuration. In the IP Office this
configuration can act as ‘trunks’ across the SIP Line. Additional information regarding
the SIP URI tab is available in documentation and the HELP files.
The basic display provides an overview of the channel configuration (empty by default).
The detail configuration tabs become available when selecting “ADD” (defining a new
entry) or “EDIT” to change an existing entry highlighted.
In the SIP URI tab display select and click “ADD”
(displayed next page…)
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Via = “IP Address” (example 192.168.42.1)
Automatically assigned by the IPOffice. The address is assigned from the LAN interface
selected in the “SIP Line” definition “Use Network Topology Info”. It identifies the LAN
interface and the IP address of the SIP Line in the IP Office.
NOTE 3: The below marked (*) entries must be configured in coordination with the ITSP
for field use. For the test network set as below. These three (3) fields: Local URI,
Contact, and Display Name, have pull down menu settings and can be modified directly
by the Administrator to a specific entry. If administratively edited the text entered will be
used on all outbound calls using this SIP URI. Check with the ITSP regarding names
and naming conventions used in your deployment.
* Local URI
Change from the default “Use Authentication Name”, for the test network use the pull
down menu and select “Use User Data”. With SIP enabled each User now has a “SIP”
data tab the programming and use of which is describe in detail later in the document.
With the menu set to ‘Use User Data’ the data in the User SIP tab will be used to
populate this field for the outgoing call.
* Contact
Change from the default “Use Authentication Name”, use the pull down menu to select
“Use User Data”.
* Display Name
Change from the default “Use Authentication Name”, use the pull down menu to select
“Use User Data”.
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Registration
Default to Primary – leave at default - registration is not used in the test network. Check
with the ITSP to verify if Primary or Secondary registration is used and used per call.
Incoming Group
Default is zero (0). The SIP URI trunk group number assigned by the System
Administrator for this SIP URI. Best practice is to set the Group number to that used /
assigned to the SIP Line, in this instance SIP Line 16.
Outgoing Group
Default is zero (0). This is the SIP URI trunk group number assigned by the System
Administrator for this SIP URI Outgoing Group. Best practice is to set the Group number
to that used / assigned to the SIP Line, in this instance SIP Line 16.
Max Calls per channel
Default to 10. Leave the default for use in the test network. This value can be changed in
the field in coordination with the ITSP service settings.
Configure the ARS (outbound) – IP Office - A
After configuration of the SIP Line and SIP URI define the ARS for directing the
outbound calls to the SIP Line. For the test network the intent is to ‘dial 8’ (receive
secondary dial tone) and then dial a number defined on the remote system, directing the
call to the remote system via the SIP Line. Select the ARS section from the configuration
tree and right button click “New”. A display similar to the next page will be shown.
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ARS Route Id
Defined by the IP Office by default – not administrator selectable. In this example “51”
has been assigned by the system.
Route Name
In the test network example defined as “[8]” in an effort to keep naming and numbering
convention similar. The Route Name could also be defined with an alpha character
name (such as “SIP”).
Dial Delay Time
Each ARS route can be administratively set for a specific Dial Delay Time. The test
network will use the default “System” dial delay time.
In Service
Checked and enabled by default with the creation of a SIP Line.
Out of Service Route
In the event this Route/Line combination is out of service an alternate route can be
selected. In the test network there is no alternate route selected ( <None> ).
Time Profile
As no Time Profiles are defined in the System (not used for the test network) none are
available for selection.
Code, Telephone Number, Feature, Line Group
Each ARS can be configured with a series of Short Codes to match dialled numbers.
These are specific to the ARS and can vary with each ARS. By default the two “Dial
Emergency” codes shown are populated. For the test network define the third “N;” code
as listed. Note the Line Group ID the call is directed to is Line Number of “16” defined in
the SIP Line and SIP URI sections of this document.
Secondary Dial Tone – System Tone
Check (enable) the Secondary Dial Tone setting. The System will provide secondary dial
tone when this ARS is selected through the Short Code defined to access the route (the
Short Code will be programmed in the next step). When checked the system makes
available the “Tone” pull down menu and defaults to “System Tone”. Leave or set as
displayed for the test network.
Check User Call Barring
Unchecked for the test network. This can be used in the field as needed by the customer
system requirements.
Define a System Short Code – IP Office - A
For the test network the intent is to ‘dial 8’ (receive secondary dial tone) and then dial a
number defined on the remote system, directing the call to the remote system through
the ARS to the SIP Line. Define a System Short Code to direct calls to the ARS Route
which will select the Line Group to direct the call to – in this case SIP Line 16. Note the
pull down menu “Line Group Id” used to select the ARS Route “51 : [8]” created in the
previous step.
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User Data – SIP tab
With the introduction of SIP, each User will have a new tab for a SIP “User Data” entry.
By default this is populated with the “Name” entry of the User. These entries can be
individually programmed and can then be used to populate the SIP URI fields; Local
URI, Contact, Display Name if ‘Use User Data’ is selected in the SIP URI programming
(described earlier in this document). The example below displays User Extn203 being
identified in SIP as a global E.164 number – 17328522203. This number will later be
programmed in the ‘Incoming Call Route’ to direct any incoming SIP calls – addressed to
this E.164 number – to this User’s extension.
Define an Incoming Call Route – IP Office - A
Define an “Incoming Call Route” for each Line, Incoming Number and the Destination. In
the field you can define as many entries as necessary for the customer network.
Line Group Id = 16 (the SIP Line and SIP URI Incoming/Outgoing group defined).
Incoming number = 17328522203 - This will be the E.164 number ‘called’ by the remote
and received in SIP INVITE from the remote site. This number also matches that defined
in Extn203’s SIP data tab. Both must be defined and match to be identified in the IP
Office and the call delivered successfully.
Destination = Use the pull down menu to select Extn203.
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COMPLETED
This completes the configuration and setup of IP Office – A (IP406v2) in the test
network. The following configuration screens of IP Office – B (the IP412) have been
provided without the detail explanations. If necessary refer back to the IP Office A
(IP406v2) configuration details.
Configuration of IP Office – B (IP412):
Set the IP Office – B (IP412) configuration tabs as per the following screen shots. Check
the settings when completed to ensure correct configuration and operation with IP Office
– A in the test network.
IP412 – SIP Trunk Channel License
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IP412 – Gatekeeper Tab
IP412 – Network Topology Tab
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IP412 – SIP Line Tab
IP412 – SIP URI Tab
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IP412 – SIP ARS Tab
IP412 SIP Short Code Tab
User Data – SIP tab
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IP412 – SIP Incoming Call Route Tab
COMPLETED
This completes the configuration and setup of IP Office – B (IP412) in the test network.
With both IP406v2 and IP412 properly configured as per the above screen shot
examples the IP Offices will use the SIP Line (back-to-back) to initiate and connect calls
using the SIP Line.
Testing and Verifying Operation
For the test network the intent is to ‘dial 8’ (receive secondary dial tone) and dial a
number on the remote system (one that has been configured through the above
examples), directing the call to the remote system via the back-to-back SIP Line.
Initiate a call from IP Office – A (IP406v2) extension 203. Dial “8”, receive secondary dial
tone, then finish dialling “17328523302” (the extension number of the first expansion
module port 1 digital phone) on IP Office – B (IP412).
After the System Dial Delay Time IP Office – A will initiate a SIP INVITE across the SIP
Line to the remote system (IP Office – B – IP412). This can be viewed using the IP
Office Monitor application and checking the display boxes in the SIP filter tab. Extension
302 on the remote system will begin ringing and the phone display should show
“17328522203@example.com”. This verifies the SIP Line in operation, as the incoming
call is identified as being received from “17328522203” (Extn203) and the
“example.com” Domain name defined in the IP406v2 SIP Line.
Initiate a call from IP Office – B (IP412) extension 302. Dial “8”, receive secondary dial
tone, then finish dialling “17328522203” (the extension number of the first DS port on the
front of the IP Office – A (IP406v2).
After the System Dial Delay Time IP Office – B will initiate a SIP INVITE across the SIP
Line to the remote system (IP Office – A – IP406v2). This can be viewed using the IP
Office Monitor application and checking the display boxes in the SIP filter tab. Extension
203 on the remote system will begin ringing and the phone display should show
“17328523302@ example.com”. This verifies the SIP Line in operation, as the incoming
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call is identified as being received from “17328523302” (Extn302) and the
“example.com” Domain name defined in the IP412 SIP Line.
Issued by:
Avaya GSS Tier 4 Support
Contact details:EMEA/APAC
Tel: +44 1707 392200
Fax: +44 (0) 1707 376933
Email: gsstier4@avaya.com
NA/CALA
Tel: +1 732 852 1955
Fax: +1 732 852 1943
Email: IPOUST4ENG@Avaya.com
Internet: http://www.avaya.com
© 2007 Avaya Inc. All rights reserved.
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