Touchstone™
Telephony Modem TM502G
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Application
The Touchstone TM502G delivers two lines of primary line Voice over IP (VoIP) along with
High-Speed Data Access. The Touchstone Telephony Modem TM502G uses a single
battery slot with two battery pack options to support telephony service during extended
power outages.
Leadership in Battery Technology
The Touchstone TM502G extends ARRIS battery technology leadership with the
introduction of the E-MTA industry’s first 2-cell, Lithium-Ion battery pack. This 2-cell, Li-Ion
battery pack coupled with ARRIS industry leading power management allows the
Touchstone TM502G to support up to 5 hours of battery backup. For more demanding
applications, a 4-cell pack is available that provides up to 10 hours of battery backup.
Both lithium-ion battery packs provide 6 to 10 years of service life versus the 3 to 5 years
typical of a sealed lead acid (SLA) battery. The lithium-ion batteries are easy to install,
allowing for customer battery replacement.
Setting the Standard for VoIP Subscriber Premise Equipment
ARRIS is the market leader in subscriber premises equipment for cable telephony with
deployments of millions of lines of proprietary constant-bit rate (CBR) Cornerstone® Voice
Ports® and DOCSIS / PacketCable compliant Touchstone Embedded Media Terminal
Adaptors.
The Touchstone TM502G continues ARRIS cable telephony leadership by incorporating
5th generation DOCSIS silicon with updated telephone line interfaces while maintaining
the feature set of the widely deployed ARRIS Cornerstone and Touchstone TM402 line
interfaces. Each line interface continues to support a 5 REN per line ringing capacity and
48 VDC nominal battery feed. Each line interface also supports advanced features such as
selectable ringing waveforms, “boost” loop current, loop voltage management for alarm
systems, and template or SNMP provisioned telephony channel settings.
The Touchstone TM502G supports enhanced telephony features include Automatic Gain
compensation for Tones and Signals (FSK/CAS), provisioned fixed or dynamic jitter
buffers, and G.168 compliant echo cancellation. Advanced signal processing methods
provide RFC 2833 compliant DTMF relay, T.38 Fax transmission, three-way calling, call
waiting, and caller ID.
Optimized Performance
The Touchstone TM502G continues the ARRIS strategy of a single firmware platform for
all Touchstone Telephony Modem models. This ensures consistent quality and
performance of all Touchstone Telephony Modems. Do not put your trust in reference
designs that cannot deliver the performance and requirements for your telephony service.
When it comes to high-speed data service, subscribers will accept occasional lock-ups or
momentary loss of connectivity that may require them to reboot their cable modem. This
behavior is not acceptable for telephony. Telephony customers demand 99.999%
availability
All ARRIS Touchstone Telephony Modems support a wide variety of class features
including three-way calling, call waiting, caller ID, Emergency 911 and regulatory
requirements for wiretap under CALEA legislation.
PacketCable & Session Initiated Protocol Support *
All Touchstone Telephony Modems support PacketCable (NCS) and Session Initiated
Protocol (SIP) protocols. Both signaling protocols are based on the same architecture
which allowing ARRIS to maintain similar capabilities between firmware loads (i.e.,
provisioning, management, web interface). In addition, the available SIP signaling
provides Quality of Service (QoS) consistent with PacketCable Multimedia QoS methods.
• DOCSIS® 2.0 and
PacketCable™ 1.1/1.5
compliant design
• Long-life lithium-ion battery
technology minimizes
operational expense
• Simplified interoperability
through PacketACE™
configuration file editor
• Increased CPE
compatibility with Boost
Current and Automatic Gain
compensation for Tones
and Signals (FSK/CAS)
• Firmware configurable
battery management and
reporting allows
customization of operation
parameters
• *Multiple Protocol Support:
PacketCable (NCS) and
Session Initiated Protocol
(SIP)
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