Owner's manual

264 NT5D33 and NT5D34 Lineside E1 Interface cards

ELEI additional functionality

As mentioned earlier, ELEI cards are enhanced to allow CAS+

compliance, as shown in Figure 57 "CAS+ compliance" (page 264). This

enhancement provides several additional benefits for systems with ELEI

cards installed.

Note: MDECTS and ELEI (operating in enhanced mode) cannot be

configured on the same system.

Figure 57

CAS+ compliance

Key Benefits of using CAS+ signaling (ELEI mode) over traditional A/B bit

signaling (LEI mode) include:

1. Calling Line ID Presentation (CLIP)

When an incoming call over the TDM/IP network or a CS

1000originated call is directed towards the CAS+ compliant system,

Calling Line ID can be provided over the CAS+ interface. This is

assuming that the incoming call has the CLID without any presentation

restrictions.

2. Redirecting Line ID Presentation (RLIP)

When an incoming call over the TDM/IP network or a CS

1000originated call which has undergone redirections is directed

towards the CAS+ compliant system, Redirecting Line ID can be

provided over the CAS+ interface. This is assuming that the incoming

call has the Redirecting Line ID without any presentation restrictions.

3. Message waiting indication (MWI)

Message waiting indication can be provided over the CAS+ interface.

Electrical speciﬁcations

Table 98 "LEI card - line interface unit electrical characteristics" (page

265) provides a technical summary of the E1 line interface. Table 99 "LEI

card - power required" (page 265) lists the maximum power consumed

by the card.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008