Nortel Remote Office 9150 Installation And Administration Manual page 445

March 2000
Use of Frame Relay and ATM services
IP can be transported over Frame Relay and ATM services, both of which
provide QoS-based delivery mechanisms. If the router can discern Remote
Office traffic by inspecting the TOS field or observing the UDP port numbers, it
can forward the traffic to the appropriate Permanent Virtual Circuit (PVC) or
Switched Virtual Circuit (SVC). At the data link layer, the differentiated virtual
circuits need to be provisioned. In Frame Relay, the differentiation is created by
having both zero-Committed Information Rate (CIR) and CIR-based PVCs. In
ATM, differentiation is created by having virtual circuits with different QoS
classes.
Internet Protocols and ports used by Remote Office
The following IP applications and protocols are used by Remote Office and must
be transmitted across your intranet by all IP routers and other network
equipment:
TCP port 12800
UDP ports
proprietary trunk protocol and High Level Data Link Control (HDLC)
encapsulation
IP stack
This information should be validated and included in the Remote Office network
engineering guidelines.
TCP port 12800
Remote Office uses well-known TCP port 12800 to establish a signaling session
over TCP between the MIG RLC and each Remote Office 9150 unit. The
encapsulation over TCP is a proprietary format that encodes the X.11 signaling.
Installation and Administration Guide
Network engineering guidelines
419