Nokia 7705 SAR - 3.6.6 Serial Transport Over Raw Sockets

Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 179
The input gain defines the magnitude of the increase or decrease of the signal
transmitted into the bridge. The input gain range is –16 to +9 dB in 1-dB increments
(the default is 0 dB).
The output gain defines the magnitude of the increase or decrease of the signal
received from the bridge. The output gain range is –16 to +9 dB in 1-dB increments
(the default is 0 dB).
3.6.6 Serial Transport Over Raw Sockets
Serial transport over raw sockets provides the capability of transporting serial data,
in the form of characters, over an IP transport service within a Layer 3 IP/MPLS
service (IES or VPRN). A raw socket allows direct sending and receiving of IP
packets without any protocol-specific transport layer formatting. For information
about raw socket IP transport services, refer to the 7705 SAR Services Guide,
Service Overview chapter, “Raw Socket IP Transport Service”.
The feature provides the functionality for a local host to listen to and open raw socket
sessions from remote hosts, and for a remote host to initiate and open raw socket
sessions to local hosts. The local and remote host functions support TCP or UDP
sessions (but not both concurrently) over the IP transport service.
Raw sockets are supported on the following hardware:
• RS-232 ports on the 12-port Serial Data Interface card, version 2
• RS-232 ports on the 7705 SAR-Hc
• RS-232 ports on the 4-port T1/E1 and RS-232 Combination module
Figure 26 shows an example of a raw socket application, where serial data is
transferred between RTUs and a utility’s SCADA management system using an IP
transport service across a Layer 3 service (IES or VPRN), that includes
7705 SAR-H/Hc and 7705 SAR-8/18 nodes.
Note:
• RS-232 serial data can be carried over Cpipes or over raw sockets using IP transport.
To use Cpipes, the RS-232 port must be configured with a channel ID. To use raw
sockets, the RS-232 port must be configured with a socket ID.
• The 12-port Serial Data Interface card, version 2, supports a mix of Cpipes and raw
socket serial links on the same card.