COMSPHERE 3550 Series Data Service Units
| Table |
| Identity Descriptions |
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Description | Information Displayed |
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Model: | 3550 or 3551. |
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S#: | Unit serial number. |
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DSU SW ver: | Software/firmware version residing on DSU. |
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Netwrk Addr: | Unit's network address. |
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DSU Rate: | Value set for DSU Rate(Kbps) configuration option. |
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DBM Rate: | Value set for DBM Rate(Kbps) configuration option; the DBM's aggregate speed. It only |
| appears when a V.32 DBM is installed. |
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MUX Card: | 2Prt ± Type of TDM/Flex installed. It only appears when a TDM/Flex is installed. |
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MUX App: | TDM or None ± Currently configured application (refer to the MUX (Setup) option set). It |
| only appears when a TDM/Flex is installed. |
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MUX SW ver: | Software/firmware version residing on TDM/Flex. It only appears when a TDM/Flex is |
| installed. |
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Backup Branch
The Backup (Bckup) branch controls dial backup operation. This branch appears when a DBM is installed, or when the DSU is configured to support an external dial backup unit (DBU). The following sections explain dial backup operation.
Dial Backup Operation
The Model 3550 or 3551 DSU with dial backup capability can provide backup for a
Backup is controlled primarily by software configuration options in the DBM or ExtBU, and Backup option sets. The unit can be configured so that backup can be either automatic or manual. Backup can be controlled from either the DSU's control panel or a 6700 Series NMS.
Backup begins with configuring the unit.
Configuring the Unit for Dial Backup
The following configuration options should be set, whether initiating backup manually or automatically.
DBM Option Set:
•AutoAnswer ± Select Enab.
When enabled, this option set allows the DBM to answer an incoming call. (Enab is the
•Call Setup ± Set call setup security level:
None ± No call setup security is required. (None is the default.)
Password ± Originating and receiving DBMs exchange passwords before the DBMs can enter Standby mode. There must be an incoming password (RxPwd) and an outgoing password (TxPwd) set up.
Callback ± Both DBMs must exchange passwords and a Backup Directory pointer must be sent before a call can be initiated. There must be an incoming password (RxPwd) and an outgoing password (TxPwd) set up, and the originator's local telephone number (Phone subbranch) must be stored in the answering DBM's Backup Directory.
Alarm ± No security is to be used at the control DBM, and the DBM only answers incoming calls when there is a facility alarm.
If the control DSU is to initiate the call, set the control for Pswrd and the tributary for Cllbk.
December 1996 |
