TELEPHONE INTERFACE |
DSX-1 T-1 |
Clock rate |
1.544 Mb/s ±32 ppm |
Level |
3.0/V (nominal) |
Pulse widht
Line impedance |
323.85 ns (nominal)
100 Ohm ±10% |
Other electrical
characteristics |
Complies with AT&T
TR62411 and ANSI T1.403-1989 |
Framing |
SF (D3/D4)
ESF for ISDN |
Line coding |
AMI
AMI wiht B7 stuffing
B8ZS |
Clock and
data recovery |
Complies with AT&T
TR62411 and Bellcoreо TA-TSY-000170 |
Jitter tolerance |
Complies with AT&T
TR62411 and ANSI T1.403-1989 |
Connectors
Telephony bus connector |
RJ-48C
H.ЮO-style 68-pin fine pitch card edge connector |
Loopback |
Supports switch-selectable
local analog loopback and software selectable local digital
loopback |
Zero code
suppression |
Bellо ZCS
(Jam bit 7), GTEо (Jam bit 8), Digital Data
Servisо ZCS, No zero code suppression |
|
TELEPHONE INTERFACE |
CEPT E-1 |
Network clock
rate |
2.048 Mb/s ±50 ppm |
Internal
clock rate |
2.048 Mb/s ±32 ppm |
Level
Pulse widht |
2.37 V (nominal)
for 75 Ohm or 3.0 V (nominal) for 1120 Ohm lines
244 ns (nominal) |
Line impedance |
75 Ohm, unbalanced or
120 Ohm, balanced |
Other electrical
characteristics |
Complies with CCITT Rec.
G.703 |
Framing |
CCITT G.704-1988 with
CRC4 |
Line coding |
HDB3 |
Clock and
data recovery |
Complies with CCITT Rec.
G. 623-1988 |
Jitter tolerance |
Complies with CCITT Rec.
G. 823, G. 737, G. 739, G. 742-1988 |
Connectors |
BNC for 75 Ohm or RJ-48C
for 120 Ohm lines |
Telephony
bus connector |
H.ЮO-style 68-pin fine
pitch card edge connector |
Loopback |
Supports switch-selectable
local analog loopback and software selectable local digital
loopback |