System Maintenance Options
.
Table 25: Layer 1 Configuration Parameters
Parameter
Standard
Framing
Signal Class
Coding
Length (T1 and T1CSU only)
Termination (ISDN signal class
only)
140 Administration and Maintenance of the S700/780 Audio Conferencing Server
Description
Specifies the carrier rate for the trunk.
Specifies the framing type used for the trunk.
For T1 and T1CSU:
●
Extended Super Frame (ESF)
●
Super Frame (SF)
●
For E1:
●
CRC4
●
Basic
●
Specifies the signaling class for the trunk:
E&M (or Robbed Bit)
●
ISDN
●
Specifies the line coding for the trunk.
For T1 and T1CSU:
●
B8ZS
●
Jammed Bit (B7ZS)
●
AMI
●
For E1:
●
HDB3
●
AMI
●
Specifies the DSX-1 pre-equalization and DS-1
(CSU) line build out measured in feet:
0 - 133 translates to -15.0 dB for CSU.
●
133-266 translates to -7.5 dB for CSU.
●
266-399 translates to 0 dB for CSU.
●
399-533 translates to 0 dB for CSU.
●
533-655 translates to -22.5 dB for CSU.
●
Specifies the line impedance:
120 ohm for twisted pair
●
75 ohm for coaxial
●