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Configuring T1 and E1 Trunk Modules
T1 and E1 module specifications
Table 9-3. T1 and E1 line module specifications
Specification
QoS types supported
Discard policies
Specifications unique to T1 line modules
Table 9-4 lists the specifications that apply only on T1 modules.
Table 9-4. T1-specific specifications
Specification
Line code
Frame format
Line rate
Impedance
Line buildout options
(short-haul)
Line buildout options
(long-haul)
Cell rate
IMA differential delay
9-38
Description
Constant bit rate (CBR), variable bit rate
(VBR)-real time, VBR-nonreal time, and
unspecified bit rate (UBR)
Early packet discard (EPD), partial packet discard
(PPD), and queue length exceed
Description
G.703 bipolar 8-zero substitution (B8ZS) or
alternate mark inversion (AMI)
Extended superframe (ESF) (ANSI T1.408) or D4
1.544Mbps (± 50bps)
100 ohms
< 133 feet (<40.5M) = 0.6dB
134 to 266 feet (40.8m to 81.2m) = 1.2dB
267 to 399 feet (81.3m to 121.7m) = 1.8dB
400 to 533 feet (121.8M to 162.6m) = 2.4dB
534 to 655 feet (162.7M to 199.6m) = 3.0dB
0dB
7.5dB
15dB
22.5dB
3622 cells/second (UNI mode)
Up to 281ms among IMA group constituents
Stinger® MRT Getting Started Guide
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