Howto:Colt VoIP Access SIP Provider Compatibility Test

Innovaphone Compatibility Test Report

Summary

SIP Provider: Colt

• Features:

• • Direct Dial In
  • DTMF

• Supported Codecs by the provider
  • G711A
  • G729
  • T.38

Current test state

This product is being tested right now. The test is not yet completed.

Testing Environment

Scenario NAT

This scenario describes a setup where the PBX and phones are in a private network. The IP800 works as media relay, all RTP - streams go through the PBX.

Test Results

For more information on the test procedure, please read the following wiki article: SIP Interop Test Description. Bold lines in the test results indicate a KO-criteria.

Basic Call

Tested feature	Result
call using g711a	Yes
call using g711u	Yes
call using g723	Yes
call using g729	Yes
Overlapped sending	No
early media channel	Yes
Fax using T.38	Yes, requires Media Relay & STUN
CGPN can be suppressed	Yes
CLIP no screening	Yes
Reverse Media Negotiaton	Yes
Long time call possible	Yes
External Transfer	Yes, requires Media Relay
Voice Quality OK?	Yes

Direct Dial In

Tested feature	Result
Inbound(Provider -> Innovaphone)	Yes
Outbound(Innovaphone -> Provider)	Yes

DTMF

Tested feature	Result
DTMF tones sent correctly	Yes
DTMF tones sent correctly via SIP-Info	Yes
DTMF tones received correctly	Yes

Hold/Retrieve

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

Transfer with consultation

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)

Tested feature	Result
Call can be transferred	Yes
Held end hears music on hold or dialling tone	Yes
Call returns to transferring device if the third Endpoint is not available	Yes

Blind Transfer

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

Broadcast Group & Waiting Queue

Tested feature	Result
Caller can make a call to a Broadcast Group	Yes, requires Media Relay
Caller can make a call to a Waiting Queue	Yes
Announcement if nobody picks up the call	Yes

Configuration

Firmware version

• version 9.00 hotfix4

SIP - Trunk

First of all the SIP Trunk must be configured. Since Colt authenticates a user account only by IP - Address, you cannot use the normal SIP-Gateway object. You need to configure a GW without registration and route the calls to the PBX. Make sure that Media Relay is activated and an exclusive codec is selected.

Number Mapping

Route Settings

Because Colt, as most SIP - Providers too, doesn't support overlap sending, you must enable the blockwise sending of the phone number. You can do this by enabling Force enblock in your routes.

The second setting you must check is Interworking(QSIG,SIP). This feature must be enabled to properly relay supplementary services, like Hold over the SIP Trunk. If this checkbox is unchecked only basic call Information like connect and disconnect will be forwarded by the Gateway.

It is also very important that the correct number is sent to the SIP provider. To ensure this the gateway 'Routing Table' must contain a Clip No Screening configuration, as shown below.

Fax

The FAX was connected via a IP22 to the IP800. When configuring the IP22 you must keep in mind that you will use the analog interface for fax communication. That's why the T.38 codec must be enabled. Additionally an exclusive codec must be selected at the analog interface.

CLIR

To suppress the CGPN for outbound calls a config line option must be activated. Please enter the following lines in your browser:

http://PBX-IP-address/!config add SIP /pai
http://PBX-IP-address/!config write
http://PBX-IP-address/!config activate