Chapter 1 Product Description
1-1
1. PRODUCT DESCRIPTION
1.1 Overview
The Loop-V 4200-9 is a versatile 9-port device. Depending on the plug-in cards selected, this unit can be
configured (a) as a CSU/DSU with drop and insert and voice capabilities, (b) as a 4 E1 to 5 T1 converter or
fractions of them, (c) as a digital cross-connect system (DACS), (d) as sets of ICSU combined in one box,
and (e) as a channel bank. As a CSU/DSU, data from the V.35 or X.21 port can occupy any fraction of an
E1 or T1 port. As an E1 to T1 converter, A to
µ
law and signaling conversions are correctly handled. For
both E1 and T1 ports, continuous error checking, performance polling, and in-service diagnostics are
provided. In any of the above combinations, full time slot interchange (TSI) among the ports are possible,
making the Loop-V 4200-9 a small DACS (digital access cross-connect system). The ports can further be
used in pairs as ICSUs (intelligent CSU) at lower cost and smaller space than individual ICSUs. Lastly, the
Loop-V 4200 can be configured as a channel bank.
The Loop-V 4200-9 supports local control and diagnostics by using a 2-line by 40-character LCD display and
keypads on the front panel, or by using a VT-100 terminal connected to the console port. The Loop-V 4200-9
also supports Ethernet, Telnet, and SNMP, so it can be controlled and diagnosed from remote locations. The
Loop-V 4200-9 also supports inband Management, where management data is carried the same way as user
data, traversing national networks.
In addition to the LCD display, 12 multicolor LEDs provide status indication for power, test condition, alarm,
and each of the 9 ports. Internal firmware is stored in flash memory so that future software upgrades can be
downloaded.
1.2 Physical
Description
Loop-V 4200 MuxMaster is a compact box that can be either rack mounted taking up 1U of rack height or
placed on desktop. Depending on the power plug-in card used, power can be either AC, DC, or dual DC
module with dual DC feed.
Figure 1- 1 Pictorial of Loop-V 4200 MuxMaster Series Products