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Connecting Voice Interface Cards to the Network
Multiflex Trunk Interface Cards
Multiflex trunk interface cards support generic 1- or 2-port T1 or E1 trunk interfaces for voice, data, and
integrated voice and data applications. These cards provide basic structured and unstructured service for
T1 or E1 networks.
They can be used as trunk interfaces for voice and data services, as fractional n x 64-kbps service for
WANs (Frame Relay or leased line), or for time-division multiplexing (TDM) drop-and-insert (voice and
data integration) services.
Multiflex trunk interface cards provide voice and data access to the PSTN domain through TDM ports,
and include an integrated channel service unit/data service unit (CSU/DSU).
Some 2-port multiflex trunk interface cards also support the drop-and-insert process, which adds data to
a T1 or E1 data stream, or terminates data from a T1 or E1 data stream to other devices connected to the
drop-and-insert equipment.
Caution
When both ports on a VWIC-2MFT-T1, VWIC-2MFT-E1, VWIC-2MFT-G703, or VWIC-2MFT-E1-DI
interface card are configured as clock source line, then they must be set to the same clock source. If they
are not set to the same clock source, timing slips can occur. Each port on the VWIC2-2MFT-T1/E1 and
VWIC2-2MFT-G703 interface cards can be set to independent clock sources for data applications.
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
Caution
connect the VWIC-2MFT-G703 only to intra-building or non-exposed wiring or cabling. The
intrabuilding cable must be shielded and the shield must be grounded at both ends.
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
Caution
connect the VWIC2-2MFT-T1/E1, VWIC2-1MFT-T1/E1, VWIC2-1MFT-G703, VWIC2-2MFT-G703
ports only to intra-building or nonexposed wiring or cabling. The intrabuilding cable must be shielded
and the shield must be grounded at both ends. The intra-building port(s) of the equipment or
subassembly must not be metallically connected to interfaces that connect to the OSP or its wiring. These
interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in
GR-1089-CORE, Issue 4) and require isolation from the exposed OSP cabling. The addition of Primary
Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.
This section describes the following multiflex trunk interface cards:
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1-port T1 multiflex trunk interface card (VWIC-1MFT-T1)
2-port T1 multiflex trunk interface card (VWIC-2MFT-T1)
1-port E1 multiflex trunk interface card (VWIC-1MFT-E1)
2-port E1 multiflex trunk interface card (VWIC-2MFT-E1)
1-port E1 multiflex trunk interface card with G.703 support (VWIC-1MFT-G703)
2-port E1 multiflex trunk interface card with G.703 support (VWIC-2MFT-G703)
2-port T1 multiflex trunk interface card with drop-and-insert capability (VWIC-2MFT-T1-DI)
2-port E1 multiflex trunk interface card with drop-and-insert capability (VWIC-2MFT-E1-DI)
1-port T1/E1 multiflex trunk interface card (VWIC2-1MFT-T1/E1)
2-port T1/E1 multiflex trunk interface card (VWIC2-2MFT-T1/E1)
Multiflex Trunk Interface Cards
OL-12847-01
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