CTC Union TRM01, Руководство пользователя

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Chapter 1. Introduction
1
TRM-01 APR 2000
1.1 General
The TRM-01 is a 4U (7") high 19" Rack, containing multiple T1
CSU/DSUs for Fractional T1 network access. The TRM-01 provides an
economic solution in high density T1 installations such as central offices. There
are 13 slots available for installation of
FT1 Cards (G.703 Fractional T1) into
the
TRM-01
compact RACK. An optional SNMP Card may be installed into
the last slot, for local and remote management purposes, leaving 12 slots
available for
FT1 Cards . Each FT1 Card may be linked to a remote TTU-01
or TTU-01A stand alone T1 CSU/DSU Access Unit to provide a variety of
LAN-to-LAN, Video Conference, Host to client, or Host to Host applications
over T1 Network Services.
1.2 Functional Description
The
TRM-01
may optionally incorporate two separate Power Module
supplies, which, depending on the model, may derive power from either an AC
power source (95~250VAC) or DC (-54 to -42VDC) power source. The power
supply modules provide for power redundancy and are hot swappable even
during the
FT1 Cards ' transmissions. The TRM-01 provides all interface
connections on the rear panel. BNC and Terminal Blocks are used for T1 Line
interface connections, while optional cable adapters are used to convert the
HDB26 DCE ports to V.35, RS-530, RS-449 or X.21. When an
FT1/ET10
Card (Ethernet bridge interface) is installed in the
TRM-01
, the card can
provide either Ethernet bridging or repeating (non-filter mode) over the T1 link.
When cards are inserted in slots, LEDs on the front panel will show both the T1
Line and Data port statuses, Power Status, and any Alarm indications.
The FT1 Card data channels support user-selectable transmission rates,
which are integer multiples of 56Kbps or 64Kbps (fractional T1), up to a
maximum 2048Kbps (unframed T1), for a line attenuation of up to 43 dB on
twisted pair or coax cables. This provides an approximate operating range of up
to 2Km (over 22AWG wire).
The FT1 Card packs its data channel into user selected T1 link time slots.
The unused time slots may have IDLE code of 0xff or 0x7e inserted (in frame
mode) or they may insert the receive side time slot's data (In cascade mode).
The TRM-01 has three major types of FT1 Card data port interface
modules, which provide the desired interface: V.35, RS-530, or ET10 Ethernet.
X.21 and RS-449 interfaces are fully supported using the RS-530 (public) card
and appropriate X.21 and RS-449 adapter cables.