Quad CT1/E1 GPIM Network Interface Specifications

The Quad CT1/E1 Gigabit-Backplane Physical Interface Module (GPIM) provides the network interface specifications specific to T1 or E1 modes, listed in Table 72.

Table 72: Quad CT1/E1 GPIM Network Interface Specifications

Description

T1 Mode

E1 Mode

Network Interface Specifications

Line encoding

AMI/B8ZS

HDB3

Mode

Framed clear channel

  • Framed clear channel (64 Kbps)
  • Unframed clear channel

Fractional framing

  • Superframe (D4/SF)
  • Extended Superframe (ESF)
  • G704
  • G704 with no CRC4
  • G703 Unframed
HDLC Features

N x 64 Kbps or N x 56 Kbps, nonchannelized data rates

(T1:N=1 to 24)

(E1:N=1 to 31)

CRC

16/32

16/32

Shared flag

Supported

Supported

Idle flag/fill

Supported

Supported

Counters

Runts, Giants, FCS, Error, Abort Error, Align Error

Runts, Giants, FCS, Error, Abort Error, Align Error

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