Lines Settings

Status

Status of the line as reported by the PortMaster, up or down.

Status 2

The status of layer 2, as reported by the Portmaster, up or down.

Line Type

Note - T1 and E1 settings are mutually exclusive and depend on the PortMaster mode.

ISDN Uses the line as PRI B channels (default).

T1 Uses the entire line as a T1 line.

E1 Uses entire line as an E1 line.

FRACTIONAL Divides the line into groups.

INBAND Sets the line for inband signaling for channelized T1 and E1. Signaling must also be set.

Signaling

When the line type is inband---for channelized T1---the type of inband signaling protocol in use:

trunk e&m wink start E & M wink start protocol, an option for use with T1 lines (Default).

trunk e&m immediate start E & M immediate start protocol.

fxs loop start Foreign exchange station (FXS) loop start protocol.

Profile

Framing

Framing format in use for the T1 or E1 line:

ESF Extended superframe---default for T1.

D4 D4 framing, alternative format for T1.

CRC4 Cyclic redundancy check 4---E1 default.

FAS Frame Alignment Signal---alternative format for E1.

NONE

Encoding

Encoding method in use for T1 and E1 lines:

b8zs Bipolar 8-zero substitution---T1 default.

ami Alternate mark inversion.

hdb3 High-density bipolar 3---default for E1.

PCM

Pulse code modulation (PCM), a digital encoding method used for analog signals. Change this setting only if required by your PRI service provider.

U-LAW Default method of analog-to-digital conversion used for T1 PRI lines.

A-LAW Default method of analog-to-digital conversion used for E1 PRI lines.

Loopback

If enabled, you can test the telephone line of your T1 or E1 ISDN connection by setting the local network loopback.

Clocking

Sets the source for the clock signal for the T1 expansion card.

Line0 line0 or Line1

Line2 T1 expansion card.

Internal Selects the built-in 1.544Mhz crystal to drive the line. This setting is used for dry wire configurations or back-to-back connections.

External Built-in digitial service unit (DSU) channel service unit (CSU) extracts the clock signal from the line. This is the default.

Line Source

See Clocking

External Source

See Clocking

NFAS Type

The NFAS setting for this line. Details

NFAS Group

Group number. An integer between 0 and 19 that uniquely identifies a T1 interface in an NFAS group. Details

NFAS Interface

Interface number. A common number assigned to all T1 lines belonging to the same NFAS group. Group is an integer between 1 and 99. Details

Common Interface Settings