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FEATURES
The SRM-6S and SRM-5S,
Synchronous Short Range Modems, are used for local data
distribution, connecting full duplex synchronous DTEs to
DTEs or controllers. A pair of modems ensures integrity of
data transmission, using unconditioned 4-wire dedicated
lines, for distances up to 11 km (6.5 miles), depending on
wire gauge and data rate.
- SRM-5S is a miniature version of
SRM-6S. Both modems are fully compatible and offer the
same features. SRM-5S is 68 mm (2.7 in) by 18 mm (0.7 in)
while SRM-6S is 110 mm (4.3 in) by 22 mm (0.9 in).
- Innovative circuitry allows the
modems to operate without connection to the mains supply,
by using ultra-low power from the data and control
signals.
- The low transmit level of 0 dBm
minimizes cross-talk onto adjacent circuits within the
same cable. Differential diphase modulation provides
immunity to background noise, eliminating line distortion
and improving transmission and reception of serial data.
Data is transmitted and received using a balanced
interface, ensuring excellent immunity to circuit noise.
- The modems are coupled to the
dedicated line through isolation transformers, rated at
over 1,500 VRMS. The transformers, in conjunction with
other circuitry, protect against AC or DC overvoltages.
This makes the modems suitable for connection to local
circuits provided by most national telephone
administrations (P.T.T.s).
- SRM-6S and SRM-5S are compatible
with the CMN-6S card of the 19( CMN-16 modem rack.
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SPECIFICATIONS
- Synchronous transmission rate, selectable up to
19.2 kbps
- Full duplex, point-to-point
- Transmission range up to 11 km (6.5 miles)
- No AC power required
- LED indicator for Carrier Detect (SRM-5S only)
- Transformer isolated
- Compact, lightweight, easy to install
- Card version for 19 in rack
SRM-6S/*/#
Synchronous Modem
SRM-5S/*/+
Synchronous Modem (Miniature)
| * |
Specify:
F for female 25-pin connector
M for male 25-pin connector |
| # |
Specify line interface for SRM-6S:
RJ-11 for RJ-11 jack
RJ-45 for RJ-45 jack
(Default is terminal block) |
| + |
Specify line interface for SRM-5S:
RJ-11 for RJ-11 jack and terminal block
RJ-45 for RJ-45 jack and terminal block
(Default is terminal block and RJ-45) |
ORDERING
SRM5S/F/RJ11/NEW
SRM5S/F/RJ45/NEW
SRM5S/M/RJ11/NEW
SRM5S/M/RJ45/NEW
SRM6S/F
SRM6S/F/01
SRM6S/F/RJ11
SRM6S/F/RJ45S
SRM6S/M
SRM6S/M/01
SRM6S/M/RJ11
SRM6S/M/RJ45S
APPLICATIONS
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