Inter-Tel AXXESS Manual page 122

Specifications
® ®
INTER-TEL AXXESS
T1/E1/PRI Cards
4.187 The T1 or E1/PRI card is compatible with any version of system software that supports
T1 or E1/PRI (domestic or international). The T1 or E1/PRI board is converted to a T1/E1/PRI
by changing a feature PAL on the board. (There is no daughter board for PRI.) The system can
support up to eight T1/E1/PRI cards.
4.188 The T1/E1/PRI card supports programmable gain control, as described on
However, it also has DIP switches to program gain control for older versions of software. (If
the phone system is upgraded to a version of software that supports programmable gain con-
trol, the programmed setting in the database overrides the settings programmed by the DIP
switch.)
4.189 The firmware for the T1/E1/PRI card resides in flash memory and needs to be compati-
ble with the version of system software in which it's being used. For 5.1 or newer versions, the
system software downloads this firmware to the T1/E1/PRI card automatically whenever there
is a compatibility mismatch. For older systems, the corresponding T1/E1/PRI firmware is pro-
vided on a disk and can be uploaded into the flash memory via a programming PC. See
126 in INSTALLATION for details.
Special T1 or E1/PRI Cabling Requirements
4.190 Inter-Tel recommends that special high-speed data cable with the following characteris-
tics be used for all T1 or E1/PRI installations:
•
•
•
•
•
4.191 If the DB15 connector on the T1 Card is used in place of the standard RJ48C jack, a
flat, 26 AWG (26 gauge thickness or larger -- smaller number gauge = larger thickness),
twisted-pair ribbon cable with a maximum capacitance of 16pF/ft may be used for distances of
up to 50 feet [15 meters]. See
feet [15 meters], use the special high-speed data cable described in
4.192 The PRI trunk is physically connected to the T1, E1/PRI, or T1/E1/PRI card using the
RJ45 jack. The DB15 connector is normally used to connect test/monitoring equipment.
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MANUAL VERSION 11.0 – May 2008
22 AWG (22 gauge thickness or larger -- smaller number gauge = larger thickness)
Individually shielded two-pair (or with the transmit and receive pairs run in separate
cables or binder groups)
ABAM or PIC (a level-3 cable designed specifically for the T-carrier transmission rate)
Maximum capacitance of 15pF/ft
Maximum attenuation of 5dB/1000 ft (300 m) at 772 kHz and 70° F (21° C)
NOTE:
The programming prompts for LBO attenuation (and DSX mode, if used)
assume that proper T1 cable (with the above characteristics) is being used. When
transmitting over shorter distances, it may be possible to use standard two-pair voice
frequency cable instead; however, the programmer may have to compensate by select-
ing a smaller LBO setting. Also, no matter which type of cable is used, the transmit and
receive pairs must be shielded from each other (or run in separate cables or binder
groups).
page 3-36 for more information. For distances longer than 50
paragraph
page 6-257.
page 3-
4.190.
T1/E1/PRI Cards