Thomson's Cirpack switching platform supports the following Class-5 Transit services.

Numbering Features

• Abbreviated Dialing
• Automatic dial on pickup
  
• Call Return
  
• Direct Dial-In
  
• Emergency Numbers
  
• Last Number Redial
  
• Local Number Portability
  
• Multiple Subscriber Number
  
• Pre-selected Carrier
  
• Terminal sub-addressing

CLI Features

• Caller ID (CLIP, CLIR, CNIP, CNIR, COLP, COLR)
• CLIP/CNIP on Call Waiting
  
• Per-call CLIR

Call Handling Features

• 3 and 6-Party conferencing
• Call Completion on Busy Subscriber (CCBS, national dependencies)
• Call Deflection
• Call Forwarding (CFB, CFNR, CFU, Unreachable)
• Call Hold / Retrieve
• Call Park
• Call Waiting (permanent, per-call)
• Do Not Disturb
• Explicit Call Transfer
• Follow Me
• General Deactivation
• Lawful Intercepts
• Missed, answered, dialed call logs
• Pre-paid/Post-paid Support

Call Barring & Call Protection

• Anonymous Call Rejection
• Black list/White list (Inbound/Outbound)
• Call Forwarding Restriction
• Incoming Call Barring
• Outgoing Call Barring
• Line Locking
• Malicious Call Identification
• Protect Against Call Forward
• Suspend Subscriber

Prompting, Messages & Music

• Change of number message
• Customized Ring Back Tone
• Feature activation prompt
• Message Waiting Indication
• Multilingual Network Announcements
• Multiple Dial Tones
• Music on Call Waiting, on Hold
• Off-hook reminder tone
• Wake-up Call (Basic and Interactive)

IP Centrex Services

• Automatic night services
• Call Pickup (SIP and MGCP)
• Call Transfer (blind or supervised)
• Click to dial
• Display and softkey customization according to RFC3149
• Hunt Groups (longest idle, cyclic, linear, random, parallel)
• Intercom Dialing
• Line Filtering by assistant (unconditional or with Black List)
• Line Supervision (SIP and MGCP)
• Multiple Call Appearances (up to 6)
• Profile substitution
• Public or Private Dialing Plan
• SIP Roaming
• Virtual Desking

Accounting & Billing

• Advice of Charge (AOC-D, -E, -99)
• Group Account Codes
• Individual Account Codes
• Toll Restriction