T-1 question? 5

[Indy53]

How far will a T-1 travel after the smart jack?

 

[BostonBiker]

From what I can find 200M (655FT) max. after the Demarc.

Hope that helps,

Bobby D

 

[CarGoSki]

Here is a useful table

Table 34. Line Compensation Settings
Signaling Mode
Signaling is the process of communicating channel-state information, such as dialing, from
endpoint to endpoint. Two types of signaling can be used in T1 transmission: robbed-bit signaling
(RBS) and common-channel signaling (CCS). Choosing a signaling mode is important only for T1
service; PRI always uses CCS (23 B-channels and 1 D-channel). The signaling types are as
follows:

Robbed-Bit Signaling. Robbed-bit signaling (RBS) replaces the least significant bit in every
sixth frame of each DS0 channel with signaling information. RBS is also called in-band
signaling because signaling information is embedded in the same channel that carries the
user’s voice or data in a call. Robbed Bit Signaling must be used if T1 Switched 56 service is
to be used on the T1 connection.
Robbed-bit signaling is appropriate for voice and voice-grade data, and digital data on
channels programmed for T1 Switched 56 service.

Common-Channel Signaling. Common-channel signaling (CCS) is an out-of-band signaling
format that places the signaling bits for channels 1 through 23 into the 8-bit word of the
twenty-fourth channel. This restricts DS1 from using the twenty-fourth channel for voice or
data transmissions. D4 framing does not preclude the use of CCS, but CCS is not compatible
with D4 channel banks because the D4 channel banks recognize only RBS. CCS is used
when PRI service is desired on the DS1 facility.
ESF framing should be used because of its improved maintenance, diagnostic, and testing
capabilities. If the transmission between two systems is voice-only, RBS should be used for all 24
communications paths. For voice transmissions, both ZCS and B8ZS line coding can be used to
satisfy the ones-density requirement: the preferred line-coding format is B8ZS, which is needed for
64-kbps digital data.
Setting dB Loss Cable Length (22-Gauge Wire)
1 0.6 0–133 feet (0–40.5 meters)
2 1.2 133–266 feet (40.5–81 meters)
3 1.8 266–399 feet (81–121.5 meters)
4 2.4 399–533 feet (121.5–162 meters)
5 3.0 533–655 feet (162–199.5 meters)
If

 

[SYQUEST]

The Compensation Loss Adjustments are base on using the correct cable for the DS1 connection from the NIU to the CSU or 100D module. That type of cable would be an individually shielded 2-pair cable similar to QUABBIN 9720 or 9760 series cables.

For more info check out this:

http://www.quabbin.com/page766.html

Quabbin has some good info available covering standards for DS1 cabling. Also articles on ANSI approved terminating methods for these cables using 8P8C Modular Plugs.

By the way, Category 5e,6,7 rated cable is NOT designed for DS1 transmission. It is designed for Ethernet transmission.

....JIM....

 

[Dexman]

For extending a T1 circuit, you would need to use cable such as Quabbin Datamax (part number 9720).

http://www.quabbin.com/finder/index.html

If it ain't broke, I haven't fixed it yet.