Zte ZXR10 ZSR V2 Series User Manual

ZXR10 ZSR V2 Series Router Product Description
20 ZTE Confidential & Proprietary
3.2.2 ML-PPP
ML-PPP bundles multiple PPP links with a purpose to increase bandwidth. It can be
applied to an interface supporting PPP.
3.2.3 HDLC
High-level Data Link Control (HDLC) is a bit-oriented link-layer protocol. It parallels with
such L2 protocol as PPP and Frame Relay (FR), and offers different services for
upper-level protocols.
The HDLC’s biggest feature is that character set is not required for data, and any bit
stream can be transparently transported.
3.2.4 FR
Frame Relay (FR) is a high-performance WAN protocol running on physical layer and
data link layer of OSI reference model.
The data packet switching technology is a simplified X.25. It removes some complex
functions of X.25 (such as window technology and data retransmission technology) and
relies on high-level protocol to provide error correction. Because FR works on WAN
devices which are better than X.25, these devices has a higher reliability. FR strictly
corresponds to the lowest two layers of the OSI reference model, while X.25 provides L3
services, so FR has a higher performance and more efficient transport efficiency than
X.25
FR WAN equipment is usually divided into data terminal equipment (DTE) and data
circuit-terminating equipment (DCE). At both ends of communications are DTE and DCE,
and the router generally works as a DTE device.
FR provides the connection-oriented communications at data link layer. A communication
link is defined between each pair of devices, and the link has a data link connection
identifier (DLCI). This service needs a permanent virtual circuit (PVC) with a DLCI. The
DLCI value is generally specified by a FR SP. The available DLCI is 16-1007 and the rest
is retained for the protocols.

Zte ZXR10 ZSR V2 Series Specifications

General

Series	ZXR10 ZSR V2 Series
Operating Temperature	0°C to 45°C
Storage Temperature	-40°C to 70°C
Ports	GE, 10GE
Storage Humidity	5% to 95% (non-condensing)