VOCAL Servers

Marshal server (MS)
- User Agent (UA) Marshal server
  - interface to/from IP phones connected to this network
  - can do different types of authentication on a per-user basis
(PSTN) Gateway Marshal servers
- provides interworking with PSTN
- interface to/from a SIP proxy server on another IP network
- Internet Marshal server
- authenticate calls via Open Settlement Protocol (OSP)
- can request QoS via Common Open Policy Service (COPS)
Conference Bridge Marshal server
- interface to/from third party conference servers
Feature server (FS)- to provide advanced telephony services
Redirect server (RS) - keep track of registered users and provide routing to/from them
Provisioning server (PS) - for configuration
Call Detail Record (CDR) server - stores start/end information about calls for billing and other purposes

[slide519]