Glossary
active core | The core that is transmitting data. For example, the DBM is the active core when |
| the unit is in Backup mode. |
Advanced Diagnostic protocol | The network management protocol used by the COMSPHERE 6700 Series NMS. It |
(ADp) | provides diagnostic communication for the network. |
auto backup | A function of the dial backup module (DBM), an external dial backup unit (DBU), |
| or a |
| automatically activates the DBM to reestablish a line when a facility alarm is |
| detected from the DDS network. |
auto restoral | A function of the DBM or external DBU, whereby the DSU automatically returns |
| to the DDS network when service is restored over the private line. On |
| |
| switching data back to the private line. |
backup | See auto backup. |
Bilateral Loopback | A combination of the DTE and Digital Loopbacks operating simultaneously in the |
| same DSU. This test is selected from the General configuration option set |
| (Bilat Lpbk: Enab). |
Bit Error Rate Test | A test used to analyze the network circuit. Both the control and tributary DSUs |
(BERT) | must be connected to the network. The originating DSU sends a |
| transmitting over the DDS network for a DSU; over the dial network for a DBM. |
broadcast | A method of transmission. The simultaneous transmission to two or more |
| communicating devices. |
buffer | A device for temporary storage of data. |
callback directory pointer | The directory entry in an originating DBM consists of the answering DBM's |
| telephone number, a delimiting character, and a callback pointer. The pointer |
| identifies the originating DBM's telephone number in the answering DBM's |
| Backup Directory. |
carrier | The device for mounting circuit cards that contains 17 slots: 1 control slot for an |
| SDU and 16 slots for data communications devices like DSUs and modems. |
| A Model 3551 DSU that is designed for installation in a COMSPHERE 3000 Series |
| Carrier used at |
December 1996 |
