Nortel SL-100 Product Manual

Also see for Meridian SL-100: User guide User guide Reference guide Fundamentals Reference manual

Contents

Nortel SL-100 Product Manual Manual pdf 80 page image

80 Meridian SL-100 remote unitsThere are two ways to exit ESA:1. Fast Cold Exit - All calls are dropped and new calls can be establishedin approximately one minute.2. Warm Exit - Established calls are not dropped, but the time to establishnew calls is extended by two to four minutes.Calls in the process of being established are dropped during ESA entryand exit.During ESA, calls to subscribers outside the remote site receive overflowtone. Emergency and operator calls are routed to specified lines in theremote. Requests for special features are ignored or receive reorder tone.Calls to subscribers within the remote site from outside receive reorderor busy tone.Meridian Cabinet Remote Unit (MCRU)The MCRU serves as an interface between remotely-located subscriberlines and the Meridian SL-100 host. The MCRU is connected to the hosteither directly through DS1 links, or through a Meridian Cabinet RemoteModule-Second series (MCRM-S) connected to the host.Each MCRU supports up to 640 lines (depending on traffic), providing thesame line quality as the Meridian SL-100 host. The MCRU provides aninterface for the following types of equipment:• 500/2500-type telephone sets• Electronic Telephone Sets (ETS)• Low-Speed Data Units (LSDU)• High-Speed Data Units (HSDU)These devices connect to the MCRU by plug-in line circuit cards. Eachtelephone set or data device has its own line card in the MCRU. This allowsreplacement of a faulty card without interruption of service to another line.The MCRU sends control data and digitized voice information from thesubscriber to the Line Group Controller (LGC) at the host site.The MCRU supports Emergency Stand Alone (ESA). If the link betweenthe host and the MCRU is interrupted, telephone calls which originate andterminate within the MCRU will be completed; however, calls to or from thehost are not possible.Note: For sites with MSL15 or above, the requirement for sites withsoftware load MSL15 is the Global ESA processor card (NTMX45AA)for Meridian SL-100 single cabinet MCRU/RLCMs. It provides theEmergency Standalone (ESA) capability in the event that host-to-remoteCommunication Server 2100Meridian SL-100 Product Guide555-4001-103 20.01 StandardSE09 20 October 2006Copyright © 2006, Nortel Networks Nortel Networks Confidential.