S | Glossary |
|
|
|
|
S
SA
Source Address: The address from which the message or data originated.
SA
Source MAC Address: A six octet value uniquely identifying an end point and which is sent in an IEEE LAN frame header to indicate source of frame.
SAAL
Signaling ATM Adaptation Layer: This resides between the ATM layer and the Q.2931 function. The SAAL provides reliable transport of Q.2931 messages between Q.2931 entities (e.g., ATM switch and host) over the ATM layer; two sublayers: common part and service specific part.
SAP
Service Access Point: A SAP is used for the following purposes:
•When the application initiates an outgoing call to a remote ATM device, a destination_SAP specifies the ATM address of the remote device, plus further addressing that identifies the target software entity within the remote device.
•When the application prepares to respond to incoming calls from remote ATM devices, a local_SAP specifies the ATM address of the device housing the application, plus further addressing that identifies the application within the local device. There are several groups of SAPs that are specified as valid for Native ATM Services.
SAR
Segmentation and Reassembly: Method of breaking up arbitrarily sized packets.
SC
Subscriber loop system optical fiber Connector: It’s a system that allows one pair of wires, that would normally provide one phone line, to carry multiple conversations. Various models are available, with capacity ranging from 2 to 96 lines. A SC or (SLCC) is used between phone company central offices and areas where there are too many customers for the cable that is in place. It’s much less expensive to install SLCCs than new cable, but the SLCC provides
Centillion 1200N ATM Switch User Manual | |
| NTP |
