Nortel Communication Server 1000 Fundamentals page 38

38 Description
Table 6
Remote IPE Card Compatibility (cont'd.)
PEC
NT8D14
NT5D14
Survivability requirements
If any of the T1 carrier links (or any portion of them) fail during normal
operation, MCR will provide "limited PBX-like" service to some of the
remote telephones until the link failure is corrected. This feature requires
the remote site to be equipped with analog trunk circuits (up to eight) that
are terminated to a single Universal Trunk (NT8D14) located in the remote
cabinet.
The remote cabinet must also be equipped with a Digital Line Card
(NT8D02) and may be configured with up to 16 Meridian Digital
Telephones. For a list of the models that support this feature, see
"Meridian Digital Telephone models supporting ESAM" (page
Traffic capacity
Each LMI and RMI card pair can support a portion of one T1 carrier link,
the full twenty-four channels of the T1 carrier link, or two full T1 carrier
links. The LMX cards interface to the T1 through the LMI card, therefore,
T1 provisioning is not required for these cards. The minimum number of
T1 channels required for LMI/RMI card pairs is 3 out of 24. This means
two are used for proprietary signaling purposes and the third is used for
standard voice/data traffic. If two full T1s are equipped, two channels from
each link are used for signaling and the balance are used for voice/data
traffic.
Blocking
Call Blocking occurs when there are more calls than available timeslots.
For ACD sets, plan one timeslot per set. For non-ACD sets, plan
according to usage. See
"Blocking" (page
T1 carrier link compatibility
MCR requires standard DSX-1 Interface (B8ZS clear channel). MCR will
support D4 or ESF framing protocols. Channel Service Units (CSUs) will
be required at the host and remote sites for each T1 carrier link. These
units are customer-provided (in some cases, CSUs are supplied by the T1
providers). The CSU must be configured for no-robbed-bit signaling. If a
portion of the twenty-four channels of the first T1 carrier link are used, the
Description
Universal Analog
Trunk
Line-side T1 Card
"Timeslot assignment and hold" (page
38).
Nortel Communication Server 1000
Mini-Carrier Remote Fundamentals
NN43001-557 04.01 4 June 2010
Copyright © 2003-2010 Nortel Networks. All Rights Reserved.
Card Slots
1-10
1-9
Slot Quantity
1
2
Table 3
30).
27), and