Feature Support:
- Basic Calls (call originations and terminations)
- Call Hold/Retrieve
- Call Transfee and Transfer-to-party
- Branding
- Ad-hoc Call Conference (MAS Conference Server)
- Meet Me Audio Conference
- Name and Number Presentation
- Voice Mail/Carrier Unified Messaging
- RTP Media Portal Selection Enhancements
- DTMF: RFC2833, SIP INFO and inband tones

Not Supported:
- 302 handling during registration
- 503 handling during registration
- 404 handling during registration
- Multiple call Originations

Nortel testing included:
- Features and feature interactions
- Basic Calls (call originations and terminations)
- Call Hold/Retrieve
- Meet Me Audio Conference
- Name and Number Presentation / Restriction
- RTP Media Portal Selection Enhancements
- SIP Client Portal/Firewall Traversal, including Automatic NAT detection
- SIP DTMF, RFC2833 and inband tones
- Client Registration
- Nortel IM (text messaging)
- G.711 and G.729a with different ptime support (20 and 30 ms)
- Nortel Xt-GUIID support
- Nortel dual-mode handset SIP header support
- Remote caller Picture-ID
- PSTN calls

Nortel did not test:
- All Ptime and codec combinations for all test cases [AG: see note above]
- Call Screening
- Redundancy
- QoS and SMS interworking
- Capacity
- Dual-mode capabilities for GSM/CDMA phones
- SMS message sending/receiving capabilities