Sangoma Tapping Solution
As requirements for security, customer service and legal
responsibilities have increased, it has become important to be able to
monitor and record telephone conversations.
Sangoma's T1/E1
tapping solution is a high performance, robust and inexpensive toolkit
that gives you complete access to the T1/E1 voice and signaling
interfaces. Based on the popular A102, A104 and A108 AFT cards, the
system supports the tapping of one, two and four T1/E1 lines per card
respectively.
A convenient Tap Connection Adapter is
available, which allows the data transport line to be hard wired with
strain relief. The tapping connections are then simply connected to the
RJ45 connectors provided.
Architecture:
The Sangoma Line Tapping Solution is comprised physically of an A102
(dual port) A104 (quad port) or A108 (octal port) T1/E1 card, standard
cabling, and a PN 633 Tap Connection Adapter. The lines to be tapped
are hard wired into the Tap Connection Adapter. Straight cables are
connected between the Tap Connection Adapter and a pair of ports on the
T1/E1 card, allowing both sides of the line to be monitored
simultaneously.
The system can be used in both standard
impedance and high impedance modes, high impedance being used to ensure
that no accidental short of the monitoring lines will affect the flow
of T1/E1 traffic.
A line can be tapped 5 times using a filtered tap without negative affects.
- Installation
- Configuration
- Operation
- FAQ
INSTALLATION
Physical installation of the Sangoma Tap is quite simple:
- Open the case of the Sangoma Tap; a screw driver will aid you in gently opening the tap.
- Connect the existing T1/E1 line to the "To NET" connector.
- Connect one end of a standard "straight" T1/E1 cable to the "To CPE" port of the tap and other end to the normal termination point of the T1/E1.
- Replace the cover of the Sangoma Tap removed in step 1.
- Confirm that all cables are installed correctly by checking that the physical layer (T1/E1) is up and active on both sides of the line.
- Connect a "straight" cable to the both "TX NET" and "TX CPE" ports of the tap and run these cables to the Sangoma card that will be used to monitor the tapped line.
CONFIGURATION
- Install the latest stable Wanpipe drivers on to the system that will be used to monitor the tapped line. You can find the latest stable drivers here.
- Once the drivers are installed, use the "WANCFG" configuration program to create configuration files.
- Select "Create a New Configuration File" to create a new file or "Edit an existing Configuration File" to edit and existing file.
- Let the driver detect the cards in the system by selecting "Select from detected cards list".
- Select the card and port number that you wish to use for tapping.
- Select the "Physical Medium" that you plan to tap, either E1 or T1.
- Next enter the "Advanced Physical Medium Configuration" menu.
- When you selected the Physical Medium the line coding and line framing was set to defaults for that medium, check to make sure that "Line Decoding" and "Framing" are set to the correct values for the line you are planning to tap.
- Nex, still under "Advanced Physical Medium Configuration" menu change
Sample T1 Configuration File
Sample E1 Configuration File
#================================================
# WANPIPE1 Configuration File
#================================================
#
# Date: XXXXXXX
#
# Note: This file was generated automatically
# by /usr/sbin/wancfg program.
#
# If you want to edit this file, it is
# recommended that you use wancfg program
# to do so.
#================================================
# Sangoma Technologies Inc.
#================================================
[devices]
wanpipe1 = WAN_AFT_TE1, Comment
[interfaces]
w1g1 = wanpipe1, , API, Comment
[wanpipe1]
CARD_TYPE = AFT
S514CPU = A
CommPort = PRI
AUTO_PCISLOT = YES
PCISLOT = 0
PCIBUS = 0
FE_MEDIA = T1
FE_LCODE = B8ZS
FE_FRAME = ESF
FE_LINE = 1
TE_CLOCK = NORMAL
TE_REF_CLOCK = 0
TE_HIGHIMPEDANCE = YES
TE_RX_SLEVEL = 120
LBO = 0DB
FE_TXTRISTATE = NO
MTU = 1500
UDPPORT = 9000
TTL = 255
IGNORE_FRONT_END = NO
TDMV_HW_DTMF = NO
[w1g1]
HDLC_STREAMING = YES
ACTIVE_CH = ALL
MTU = 1500
MRU = 1500
DATA_MUX = NO
TDMV_HWEC = NO
#================================================
# WANPIPE1 Configuration File
#================================================
#
# Date: XXXXX
#
# Note: This file was generated automatically
# by /usr/sbin/wancfg program.
#
# If you want to edit this file, it is
# recommended that you use wancfg program
# to do so.
#================================================
# Sangoma Technologies Inc.
#================================================
[devices]
wanpipe1 = WAN_AFT_TE1, Comment
[interfaces]
w1g1 = wanpipe1, , API, Comment
[wanpipe1]
CARD_TYPE = AFT
S514CPU = A
CommPort = PRI
AUTO_PCISLOT = YES
PCISLOT = 0
PCIBUS = 0
FE_MEDIA = E1
FE_LCODE = HDB3
FE_FRAME = CRC4
FE_LINE = 1
TE_CLOCK = NORMAL
TE_REF_CLOCK = 0
TE_HIGHIMPEDANCE = YES
TE_RX_SLEVEL = 120
LBO = 120OH
TE_SIG_MODE = CCS
FE_TXTRISTATE = NO
MTU = 1500
UDPPORT = 9000
TTL = 255
IGNORE_FRONT_END = NO
TDMV_HW_DTMF = NO
[w1g1]
HDLC_STREAMING = YES
ACTIVE_CH = ALL
MTU = 1500
MRU = 1500
DATA_MUX = NO
TDMV_HWEC = NO
TDM API
http://wiki.sangoma.com/wanpipe-linux-tdm-voice-api
FAQ
- How many times can I tap a line without any negative affects?
-testing in Sangoma labs has shown that you can safely tap a line 5 times using a filtered tap without any negative affects on the main link.
| 
