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T1 voice pin out
- Thread starter jgillin88
- Start date
TouchToneTommy
Vendor
Do a google search for RJ-48.
This is one of the first hits:
Basically, there are three configurations: RJ-48C, RJ-48S, and RJ-48X. RJ-48C is the most common. The X has pins that short transmit to receive when you remove the plug; I have never encountered a jack that does this (it's pins 1&2 shorted to pins 4&5, NOT 1&2 and 7&8 like an RJ-31 alarm dialer jack). The RJ-48S uses 1&2 and 7&8, so check with your provider and equipment manufacturer to see what you require.
This is one of the first hits:
Basically, there are three configurations: RJ-48C, RJ-48S, and RJ-48X. RJ-48C is the most common. The X has pins that short transmit to receive when you remove the plug; I have never encountered a jack that does this (it's pins 1&2 shorted to pins 4&5, NOT 1&2 and 7&8 like an RJ-31 alarm dialer jack). The RJ-48S uses 1&2 and 7&8, so check with your provider and equipment manufacturer to see what you require.
the RJ48X was used on powered T'1 spans, the loop back feature was in the jack, it kept the repeaters alive, and for remote testing on a loop back with no cord plugged in.
RJ48C and RJ48X both use pins 1&2 for as rec from network, and 3&4 as xmit to network on T'1 lines
RJ48s used for all sub rate data 56K and down, pins 1&2 ,7&8
RJ48C and RJ48X both use pins 1&2 for as rec from network, and 3&4 as xmit to network on T'1 lines
RJ48s used for all sub rate data 56K and down, pins 1&2 ,7&8
- Thread starter
- #4
Servamatic
IS-IT--Management
jgillin
You are correct, at least according to my USOC book.
You can download the USOC codes and some other helpful info from my web site.
Richard S. Anderson, RCDD
You are correct, at least according to my USOC book.
You can download the USOC codes and some other helpful info from my web site.
Richard S. Anderson, RCDD
Servamatic
IS-IT--Management
- Status