Ordering Pri Isdn Service (Us Only) - Cabletron Systems SmartSwitch 9W006 User Manual

O PRI ISDN S
RDERING
ISDN Primary Rate is a communications service that allows the system to make up to 23
connections over a single line. It uses a 4-wire T1 line that carries 24 channels, each providing 64000
bps bandwidth. The service uses channels 1 to 23 as bearer (B) channels to carry connections
between two systems. The 24th channel is used for signaling information (the data link).
You should request the following options for a primary rate line that is connected directly to a
SmartSwitch Remote Access Module:
• B8ZS encoding
• ESF framing
• all channels should be Circuit Switched Data
• Hunt Group (if desired)
• call bandwidth supported (56Kbps, 64Kbps, and/or 384Kbps)
• CLID (calling line Id); usually there is no charge for this
In order to connect to the primary rate line, the customer needs a Channel Service Unit (CSU),
which is integrated into the SmartSwitch Remote Access Module. If the line is provided by a LEC
or IXC, the CSU is required by the phone company to protect the phone network from any
problems with customer premise equipment. At the time that the line is ordered, the customer may
be asked for the FCC registration number for the SmartSwitch Remote Access Module that is being
used.
The cabling between the wall jack and the SmartSwitch Remote Access Module is very important,
and is also where most problems occur. The system's PRI RJ-45 adapter uses the international
standard of pins 3, 4, 5, and 6 for transmit and receive. Most T1 lines in the United States and
Europe use the traditional 1, 2, 4, and 5 pins. We provide an RJ-45 to RJ-45 Mod-Tap adapter that
will convert between the two wiring systems.
ERVICE
Primary Rate Board
(US O )
NLY
Primary Rate Adapter
RJ-45 Jack
RJ-45
Pinout
1
2
TX+ 3
RX+ 4
RX- 5
TX- 6
7
8
Adapter
RJ-45
Pinout
1 RX+
RX-
2
3
TX+
4
TX-
5
6
7
8